Founder and CEO, Cadre Style, Inc.

After practicing law for 14 years, serving as general counsel to several global organizations in the fintech space, Tania Ali combined her passions for sustainability, fashion, and the law to launch Cadre Style, an e-commerce platform specializing in third-party-vetted eco-chic brands. Ali was inspired to start Cadre Style when her commitment to reducing her own household’s environmental impact, prompted her to look more closely at the fashion industry. Witnessing the lack of regulations in sustainable fashion, Ali decided to build an online destination for on-trend eco-conscious women’s wear and accessories where consumers can trust that the brands live up to the sustainable claim.

Vic Barrett is an American climate activist. A plaintiff in the constitutional lawsuit Juliana v. The United States of America, Barrett appeared in a documentary film about the case, Youth v. Gov. He joined the nonprofit Global Kids at age 14, after experiencing Hurricane Sandy, and then became a fellow with the Alliance for Climate Education and spoke at the U.N. 2015 Paris Climate Conference. He joined the People’s Climate March in NYC and spoke in support of sustainable development at the U.N. General Assembly. Barrett has also spoken at the American Museum of Natural History, Brooklyn Museum, Friends Seminary, Yale University, Boston College, University of Wisconsin, and on Ilana Glazer’s “Generator Series.” He keynoted the Wired25 and Planet Home conference and presented before the House Foreign Affairs Committee. A Pritzker Emerging Environmental Genius Award nominee, Barrett currently organizes for the Power Shift Network.

Native New Yorker Christopher Bevans is an award-winning fashion designer of Belizean and Jamaican descent. His pioneering approach to function, fabrics, and technique has been lauded by Vogue, Woolmark, MIT Media Lab, the MacArthur Foundation, and the Council of Fashion Designers of America. An FIT alum, Bevans made his name in the industry by building his own eponymous design studio. He quickly became the go-to creative director for a who’s who of trend-setters – including Jay-Z, John Legend, Virgil Abloh, Pharrell Williams, and Kanye West – and helped to invent and reinvent brands such as Yeezy, Billionaire Boys Club, Sean John, Spyder, and Head Tennis. After his strong start in New York, Bevans was tapped to become creative director of the acclaimed Blue Ribbon Sports project at Nike and moved to Portland, where he still resides. Among his recent projects are a stint as interim creative director at Eddie Bauer, where he reinterpreted the iconic American brand for today’s world, and a partnership with Fila on a signature tennis-apparel line, the Bevans Park Collection. In everything he does, Bevans pushes the boundaries of fashion and opens doors to foster inclusivity.

Founding Director and CEO, Spin360; Scientific Director, Fashion Sustainability and Industry Evolution, Accademia Costume and Moda

Innovator and entrepreneur Federico Brugnoli founded his Milan-based consulting firm Spin360 with the goal of improving the environmental and social sustainability of leather and luxury companies all over the world. Since its founding in 2009, the firm has devoted itself to developing technologically and organizationally innovative, sustainable business models in a fast-changing world. SPIN 360 specializes in life-cycle assessments of leather and related supply chains and is pioneering the concept of carbon-neutral leather. Brugnoli earned an MSc in Environmental Sciences from the University of Milan and was awarded an honorary PhD from the University of Northampton. In addition to teaching master’s-degree students at the University of Applied Sciences and Arts of Southern Switzerland, he is Scientific Director of the Fashion Sustainability and Industry Evolution master’s-degree program at Accademia Costume and Moda in Rome.

April Calahan is a fashion and art historian, writer, and podcaster. For more than a decade, she was a Special Collections curator at FIT, where she also taught in the History of Art department. Her work has been featured in Vogue, Harper’s Bazaar, WWD, The New York Times, and The Guardian. Calahan has lectured at cultural institutions worldwide, including Los Angeles County Museum of Art, Yale University, Parsons School of Design, and National Gallery of Victoria in Melbourne, Australia. She has authored/co-authored three books on the history of fashion. And,  with longtime collaborator Cassidy Zachary, Calahan is co-executive producer and host of “Dressed: The History of Fashion” a podcast that explores the rich, complex history behind the clothes we wear.

Head of Marketing, Albini Group

Gabriele Camozzi is an accomplished marketing executive with a focus on sustainability within the textile industry. Currently, he leads the marketing department at Albini Group. After completing his academic studies in Italy and Denmark and stepping into the banking sector for a number of years, he embarked on a transformative journey in 2010 with Albini Group, establishing the company’s digital presence and coordinating the development of the textile industry’s first B2B e-commerce platform. As his role expanded, he engaged with key customers worldwide and took on sales responsibilities for the Thomas Mason accessories line. To broaden his experience, Camozzi then took a position as head of communications at the Italian design-furniture company Pedrali, from 2016 to 2018, where he led a range of initiatives, from public relations and digital marketing to managing major exhibitions like the Salone del Mobile. In 2019, Camozzi rejoined Albini Group as the head of marketing. He plays a pivotal role in crafting the sustainability report and charting the company’s sustainable pathway. Camozzi holds a bachelor’s degree in marketing and communication and a master’s degree in international marketing. Currently, he is advancing his expertise through an executive MBA program in Milan.

Max Cheng is a senior marketing associate at Keel Labs, the sustainable materials company that created Kelsun, a seaweed-based fiber with a low environmental footprint. Passionate about building mission-driven brands, Cheng leads Keel Labs’ brand and communications efforts — scaling the company’s marketing efforts over the last five years. Before joining Keel Labs, Cheng worked in sustainable agriculture, developing CSAs at public schools on Long Island, New York. Cheng earned his bachelor's degree in sociology from the Macaulay Honors College at Hunter College.

Assistant Professor, Textile Development and Marketing

Whitney Crutchfield is an assistant professor in Textile Development and Marketing and an adjunct instructor in Textile/Surface Design, serving the FIT community since 2016. Her expertise lies in woven textiles and textile dyeing techniques, with a particular emphasis on low-impact methods and materials. Crutchfield is the founder and owner of We Gather, an educational textile studio in Brooklyn. She previously held positions at American Eagle and Martha Stewart Living.

Vice President of Sustainability, Product, and Business Strategy, Mara Hoffman

Dana Davis joined Mara Hoffman in 2010 and successfully centralized and grew the company’s production and design departments, secured partnerships with facilities around the world, and was integral in the company’s transformation into the recognizable and widely distributed brand that it is today. In 2015, Davis spearheaded the company’s transition toward sustainability, focusing on increased and innovative responsible manufacturing as well as supply chain evaluation, and now sits as the company's vice president of sustainability, product, and business strategy.

As a board member of Custom Collaborative and an advisor for Nest, Thr3fold, and the New York Workforce Development Coalition, Davis is also engaged with industry organizations and educators such as Textile Exchange and the CFDA. She is a keen enthusiast of regenerative farming and spends her personal time gardening and landscaping with her husband George and their two children, Penelope and Phoenix.

Eric De Feo co-founded and serves as the head of operations and business development at Made X Hudson, a small batch cut-and-sew facility in Upstate New York. De Feo holds over a decade of experience in building, consulting, and investing with startup brands across the fashion, real estate, food, and technology sectors. He is the founder of the Hudson Community Incubator, a startup ecosystem and consultancy for Main Street businesses. De Feo earned an MArch and an MSE from University of Pennsylvania and a BA from Northwestern University.

Assistant Professor, Fashion Design, Fashion Institute of Technology 

Andrea Diodati is an award-winning fashion designer and entrepreneur. After seeing the wasteful nature of her wholesale fashion line, Diodati created a direct-to-consumer brand that used 3D modeling to facilitate customer collaboration. Clients could co-design dresses that were custom made in New York City using deadstock fabric. Diodati’s industry experience includes designing runway for Anna Sui as well as freelancing for Kate Spade and Alice + Olivia. Presently, Diodati is exploring how digital fashion can replace single-use garment consumption. She earned a BFA Integrated Design from Parsons School of Design.

Executive Director, FIT Design and Technology Lab

Michael Ferraro is the executive director of the FIT Design and Technology Lab (DTech) and is responsible for industry partnerships and collaborative programs for the college. As a creative technologist, researcher, artist, and educator, Ferraro has forged a career that spans the worlds of computer animation, software development, virtual-reality media production, fine art, commercial entertainment, and higher education. He came to FIT from Lehman College-CUNY, where he spent 12 years as an associate professor in the digital media program of the art department. In 2015, working with students, he won the NY Emmy for Graphics and Animation Supervision for a series of PSA’s entitled “Best of the Bronx.” Prior to Lehman, Ferraro founded Possible Worlds, an innovative real-time animation studio, whose clients included Warner Bros. MTV, Nickelodeon, and Cartoon Network. And in the mid-1980s, Ferraro was a co-founder of Blue Sky Studios, an Oscar-winning CGI animation studio, TM renderer, and production animation system. He made his first picture with a computer in 1969.

CEO and Founding Partner, Evrnu

Stacy Flynn is a textile and apparel environmental-justice advocate, a materials-reuse expert, and the cofounder of Seattle-based textile innovations company Evrnu. Flynn is also a TEDx and keynote speaker, who urges the fashion industry to renounce textile waste and make the circular economy a reality. With those goals in mind, Flynn and her business partner, Christo Stanev, founded Evrno in 2014. Their mission is to develop regenerative textile technologies that will help reused materials become the industry norm. Prior to Evrnu, Flynn spent nearly two decades working as a global textile specialist in roles at DuPont, Eddie Bauer, and Target. She holds an MBA in Sustainable Systems from Presidio Graduate School and a BS in Textile Development and Marketing from FIT.

Salvatore Giardina is a professor in FIT’s Production Management: Fashion and Related Industries program with over 30 years of experience in men’s tailored clothing. Currently, Giardina designs tailored and casual made-to-measure garments for Trinity Apparel, a wholesale label with 500+ dealers in USA, Canada, and Europe. He also crafts custom clothing under his own label, Salvatore Giardina Sartoriale. Giardina brings vast industry expertise and technical knowledge to his teaching at FIT, where he is active with the Menswear advisory board and a permanent advisory board member in the Textile Development and Marketing program. In 2009, the program honored Giardina as Alum of the Year. In 2016, he received a prestigious lifetime achievement award from Sicily’s Ragusani Nel Mondo, representing the USA; and he was invested as Knight of Malta for his charitable work. Giardini leads study-abroad courses in Italy, during which FIT students visit textile mills to learn how high-quality textiles are made, why Italian textiles are prized in the luxury market, and how mills’ are incorporating sustainability into their processes.

Tuwanda Green, PhD, an architect with over 32 years of experience and a PhD in design research, advocates for human-centric design. She champions this approach through her self-designed course, research endeavors, and her firm, “human.” Her firm translates scientific research and nature-based artistic principles into design solutions that inspire and optimize human performance. Collaborating with experts from diverse fields, she shares her expertise through various mediums such as writing, podcasts, and conference presentations. Green’s work is supplemented by previous government design projects, which span multiple locations domestically and internationally. She’s currently an adjunct professor at Virginia Tech and a board member at the Biophilic Institute. Green holds architecture licenses in Virginia, Maryland, and the District of Columbia, and maintains credentials with AIA, NCARB, LEED BD+C, WELL, and PMP.

Caroline Gordon has been an adjunct professor at FIT since 2018, teaching in both the School of Art and Design and the Jay and Patty Baker School of Business and Technology. She recently joined the FIT Sustainability Council. Gordon has worked in the fashion industry in New York City for nearly 20 years across multiple American brands, including Ralph Lauren, Ann Taylor, and Hill House Home. She has experience in women’s wear and children's wear, with a focus on buying, planning, and wholesale sales. In addition to teaching at FIT, Gordon runs a consulting company that helps small and sustainable companies launch their business at wholesale. Gordon is a graduate of University of Pennsylvania and is an active member of the Jay H. Baker Retail Center at the Wharton School.

Sergio Guadarrama co-founded and serves as the head of development and production at Made X Hudson, a small batch cut-and-sew facility in Upstate New York. An expert in pattern-making, with nearly two decades of fashion industry experience, Guadarrama brings his signature style and extensive network to Made X Hudson. His fashion brand, Celestino Couture, believes in designing with a purpose at the intersection of fashion, environmental sustainability, and ethical production. Guadarrama holds a BA from FIT.

Editor-in-Chief, Submission Beauty

After more than a decade of working as a fashion stylist in Europe and New York City, Jesper Gudbergsen joined Submission Beauty in 2020 as the editor-in-chief of the company’s editorial platform. Based in Los Angeles, Submission Beauty is a zero-plastic premium beauty brand that stands for environmental accountability, personal self-expression, and a new paradigm of responsible luxury. Alongside the brand’s product line, Gudbergsen and the team have established an editorial component on the site, featuring interviews with creatives across fashion, beauty, art, and music, as well as activists and advocates in sustainability. The site regularly reports and informs on the current state of the climate crisis, with a particular focus on the role the beauty industry plays.

President and Chief Strategy Officer, Therme Group US

Robert Hammond is president and chief strategy officer for Therme Group US, working to translate the success of Therme, a global pioneer of inclusive urban wellbeing, for U.S. expansion. Hammond joins Therme after more than two decades with the High Line, where, as co-founder and executive director, he led the transformation of an abandoned Manhattan railway line into an iconic urban park that attracts 8 million annual visitors. Hammond created the High Line Network to foster community and share best practices among leaders of other infrastructure renewal projects, and forged partnerships to engage young New Yorkers as environmental stewards and civic leaders. A certified Vedic meditation teacher, Hammond served ex-officio on the Metropolitan Museum of Art’s board of trustees and serves on the boards for Little Island, Sauna Aid, Grounded Solutions Network, and the San Antonio Museum of Art. He has won over two dozen awards for his work.

Curator of Costume and Accessories, The Museum at FIT

Colleen Hill, PhD is curator of costume and accessories at The Museum at FIT. She holds an MA in Fashion and Textile Studies: History, Theory, Museum Practice from FIT and is currently a PhD candidate at London College of Fashion. Since joining MFIT in 2006, Hill has curated or cocurated more than a dozen exhibitions. Her most recent exhibitions include Reinvention and Restlessness: Fashion in the Nineties (2022) and Ravishing: The Rose in Fashion (2021). She has authored or coauthored eight books on fashion and contributed to numerous other publications.

Managing Director, The Rethink Lab

Lindsay Humphreys is a seasoned sustainability professional with over 15 years of experience in the natural-fiber industry. She is currently the managing director of The Rethink Lab, a sustainability and communication agency based in South Africa. Humphreys leads initiatives aimed at aligning industry practices with evolving environmental, social, and animal welfare standards. Representing esteemed clients worldwide, Humpreys brings a comprehensive understanding of the complexities of the fiber supply chain, from farming to processing, spinning to textile and garment manufacturing, and beyond to retail. During her career, she has nurtured connections and facilitated collaborations to bridge the gap between farmers and brands. Her expertise in managing these relationships culminated in the creation of NXT, a regenerative program launched in South Africa. This initiative promises to bring substantial benefits to all stakeholders throughout the supply chain. Humphreys unwavering dedication to fostering sustainable practices has positioned her as a driving force for change within the natural-fiber industry.

Kimberly Jenkins is founder of The Fashion and Race Database and Artis Solomon, an education consultancy that provides academic and creative solutions for a more intelligent fashion system. She has spent more than ten years studying what we wear and how we express ourselves, through the lenses of politics, race, psychology, and anthropology. Jenkins has lectured globally, consulted major fashion brands and institutions, and hosted in-person experiences to help us think more deeply about dress, history, and culture. She has been a lecturer at Parsons School of Design and Pratt Institute and held the position of assistant professor of fashion studies at Toronto Metropolitan University.

Rajiv S. Joshi is an economist, community organizer, and entrepreneurial leader building global programs at the intersection of environmental, social, and economic justice. He directed the world’s largest Global South-led alliance to end poverty and is a steward to climate action initiatives worldwide. As a facilitator, he helped design the 2030 Sustainable Development Agenda and has supported global campaigns and initiatives to phase out fossil fuel, transform food systems, end illicit flows of capital, mobilize climate finance, advance the economics of wellbeing, and halt biodiversity loss. Joshi was associate dean for climate action at Columbia University’s Climate School and developed the university’s first course in Climate Tech and Regenerative Entrepreneurship. As founding CEO of Bridging Ventures, Joshi forges radical collaborations to address systemic challenges across generations, sectors, and geographies. He holds a BA in economics from Strathclyde Business School (Glasgow) and an MPA in international finance and economic policy from the School of International and Public Affairs at Columbia.

Founder, Climate Cardinals

Sophia Kianni is an Iranian-American social entrepreneur and activist. She studied at Stanford University and is the founder of Climate Cardinals, the world’s largest youth-led climate nonprofit, with 10,000 volunteers in more than 80 countries. She is the youngest United Nations advisor in U.S. history. She was recently appointed to serve on the Environmental Protection Agency’s National Youth Advisory Council.

Laboratory and Operations Manager, Genspace

Casey Lardner is the laboratory and operations manager at Genspace, New York City’s community biology lab. A neuroscientist by training, she researched epigenetic mechanisms in the mammalian brain as a doctoral student at the Icahn School of Medicine at Mount Sinai. In her postdoctoral research at Columbia University, she explored what wild urban rats can teach us about human brains and behavior. She has engaged in informal science education at every step of her career, leading her to co-direct multiple institutional outreach programs and produce an annual storytelling show called Studying the Brain. She is the President of BraiNY, New York City’s chapter of the Society for Neuroscience, and is enamored with all brains and minds, whether they belong to mice, pizza rats, people, or other living systems.

Co-founder and CEO, Werewool

Chui-Lian Lee, Textile Development and Marketing ’18, is co-founder and CEO of Werewool, a biotech company that engineers biodegradable protein-based textile fibers with inherent DNA-programmed color and performance profiles. She leads Werewool’s team of textile developers, material scientists, and bioengineers in the development of high-performance, regenerative fibers that can replace conventional synthetic fibers in today’s textile manufacturing system, offering a sustainable alternative to toxic status-quo synthetics and dyes. Lee brings a holistic perspective to supply innovation, looking at the entire lifecycle of products from mill to finished product. While pursuing her bachelor’s degree at FIT, she focused her studies on textile innovation and sustainable manufacturing and minored in Ethics and Sustainability.

Ethan Lu is assistant chair of Interior Design at FIT. He is also a principal at Metropolitan United Studio, PLLC. While working at FXFowle (now named FXCollaborative) and CookFox Architects, he contributed to several signature projects, including the Bank of America Tower, the Second Avenue Subway, and the No. 7 Subway Extension, with a focus on sustainability. Lu has taught architecture and interior design courses at Columbia University, Parsons, New York Institute of Technology, and New York School of Interior Design, specializing in design technology and sustainable design. He holds a BS in architecture from University of Michigan, a Master of Architecture from Harvard University, and a Master of Science in Architecture and Urban Design from Columbia University. Lu is a registered architect in New York and New Jersey, an NCIDQ certified interior designer, and a LEED accredited professional.

Managing Director, New York, Remake

Julie Mastrarrigo is the managing director, New York, of Remake, a global advocacy organization that unites changemakers in the fight for human rights and climate justice in the clothing industry. Remake empowers stakeholders to make the connection between commercial practices, the environment, and human rights within the fashion supply chain and to advocate for a fairer global system of apparel production. Mastrarrigo’s commitment to excellence in design and production has been a hallmark of her career. She has worked in roles for iconic brands, including 23 years at Ralph Lauren with over a decade overseeing knit design and development. Her experience includes design, materials development, team building, and corporate global manufacturing. She is an FIT alum with a BA in Fashion Design and holds a master’s degree in sustainable fashion from Glasgow Caledonian New York College. She is also senior design partner for the Martini Education and Opportunity Trust, supporting changemakers in social-innovation leadership development.

Cameron Russell is a model, writer, and organizer. She spent the last 20 years working as a model for clients including Prada, Calvin Klein, Victoria’s Secret, H&M, Vogue, and Elle. With over 40 million views and counting, her TED talk on the power of image is one of the most popular TED talks of all time. Russell is the co-founder of Model Mafia, a collective of hundreds of fashion models who are striving for a more equitable, just, and sustainable industry; and she was the force behind campaigns including #MyJobShouldNotIncludeAbuse, which brought the #MeToo movement to fashion. Russell is the author of How to Make Herself Agreeable to Everyone, a memoir on fashion, intuition, and power. Her work leverages creative collaboration and collective storytelling to interrupt extractive supply chains and build a socially and environmentally conscious present.

Theanne Schiros is an associate professor at FIT, where she guides students to rethink materials through biology and technology. Schiros is also a research scientist at Columbia University and a National Geographic Explorer. Her research focuses on advanced materials for a circular economy, including renewable-energy technology and biofabrication of regenerative textiles. She is also a co-founder of Algiknit (now Keel Labs) and Werewool, startups born from research with her students. Shiros has been engaged in international sustainable development and education since 2005, and she has received international recognition for her work, including the National Geographic Wayfinder Award (2023), Conservation X Labs Microfiber Innovation Prize (2022), and the H&M Foundation Global Change Award (2020). She has also been featured in museum exhibitions of biofabricated textiles at the Wyss Academy for Nature and the Montreal Museum of Fine Arts.

Melody Serafino, co-founder of No. 29 Communications, has overseen numerous major campaigns for international organizations, nonprofits, startups, artists, and more. Under her supervision, No. 29 has overseen media relations for a variety of brands, including TED, Rothy's, food-waste nonprofit ReFED, The Or Foundation, and more. Serafino serves on the board of A Second U Foundation and on the advisory board of the Fairfield University Center for Social Impact. A lecturer at Parsons School of Design, she also frequently speaks on panels related to storytelling and sustainability.

Rachel Slade is the best-selling author of Into the Raging Sea, a New York Times notable book of 2018 and winner of the Maine Literary Award for nonfiction. Her new book, Making It in America: The Almost Impossible Quest to Manufacture in the U.S.A. (And How It Got That Way), was published in January to critical acclaim. Slade spent a decade working at Boston magazine – first, as the design editor and, ultimately, as executive editor – and has won national awards in civic journalism, reporting, criticism, and reader service. Slade has been a lecturer in political science and journalism at Tufts University and divides her time between Brookline, Massachusetts, and Rockport, Maine.

Founder, Collina Strada

Launched in 2008, Collina Strada isn’t just a fashion label, it’s also a platform for social issues and awareness. The brand’s founder, designer Hillary Taymour, is devoted to staying true to her craft and while developing Collina Strada into a fully sustainable and radically transparent business. Designed and manufactured in New York, the brand’s cult-status core pieces transcend trends. Taymour imbues her designs with a fearlessly fluid attitude, re-inventing classics with unexpected details. The brand DNA revolves around the ability to look inward, even when being outwardly loud and expressive. Season after season, Collina Strada’s goal remains the same: to encourage self-reflection through clothing. How can you be the best version of yourself today? The brand’s New York Fashion Week shows defy convention, reimagining the fashion-show experience in ways that inspire audiences to take action on crucial global problems from racism to politics.

Owner, CeCe’s Wool

Cecilia Tkaczyk (aka CeCe) is a former New York State senator and the owner of CeCe’s Wool, a multifaceted green business comprising a yarn shop; a pillow factory that manufactures dog beds and natural-fill pillows (using GOTS-certified wool and cotton); and a farm, raising 70+ Jacob sheep. Tkaczyk is a board member of the Hudson Valley Textile Project, a not-for-profit membership organization that supports regional farms and sustainably produced fiber products. She is a strong proponent of finding new uses for discarded wool: “We need to stop throwing away the good stuff.” And she enjoys sharing her expertise about all aspects of working with wool and processing the fiber into usable material.

Fashion Model, Actress, Entrepreneur, Activist, FIT’s Sustainability Ambassador

One of the modern era’s most celebrated supermodels, Amber Valletta is an industry icon with a career that spans decades. She has been the face of many luxury brands and the muse of legendary photographers. Her face has graced numerous magazine covers, including over 70 international editions of Vogue, and she has landed major acting roles for both television and film. Years before the concept of sustainability entered the mainstream, Valletta was a voice for sustainable fashion. She has pushed for ethical industry practices through notable partnerships, including a line of eco-friendly accessories for Karl Lagerfeld. She currently serves as British Vogue’s first contributing sustainability editor and as FIT’s Sustainability Ambassador.

Entrepreneur and Author

Jennifer Walsh is a visionary entrepreneur who founded brands such as Beauty Bar, Pride & Glory, and Lost Art of Being Human. A leader in the fields of beauty, wellness, and biophilic design, she has dedicated over 25 years to revolutionizing the industry through the transformative power of nature. Through her groundbreaking work, Walsh bridges the gap between science and aesthetics. She educates and empowers brands and individuals alike to embrace the profound impact of nature on beauty, wellbeing, and human potential. Walsh is a faculty advisor at the University of Pennsylvania’s Center for Neuroaesthetics and at Harvard University’s Brain Science Initiative. Her book, Walk Your Way Calm, encourages people to get outside and embrace the health benefits of taking a walk in the natural world.