How one professor uses 'Walden' to study climate change

See the plot of land where Thoreau built his Walden cabin

Harvard's Lawrence Buell takes viewers down to Walden Pond to show them the spot in the woods where Thoreau constructed his modest cabin. Along the way, he reads from "Walden" and explains why Thoreau's text still matters 170 years after its publication.

Diving into the life of Henry David Thoreau

Before he went to live in the woods by Walden Pond, Thoreau (who originally went by David Henry) lived a fascinating life, opening a school with his brother, working for his father's pencil-making business, and becoming close to Ralph Waldo Emerson, who'd become a mentor figure for the aspiring writer. This deep profile explores all that and more.

Busting the myths about Thoreau's 'Walden'

This resource from The Walden Woods Project dispels some of the common myths about Thoreau's time in the woods, including that he was a hermit (he actually regularly visited friends), that he was freeloading (he paid off his debts), that "Walden" was a misrepresentation (he was forthcoming about editing his experiences), and that he was opposed to progress (he believed in practical technology).

Browse the original 'Walden' manuscripts

Henry David Thoreau began writing the book about his time living at Walden Pond in 1846, but it went through seven iterations before being published in 1854. You can look through scans of early proofs, including some of Thoreau's handwritten corrections, through the Huntington Digital Library.

In 2024, Walden Pond was listed as an endangered place

The National Trust for Historic Preservation listed the site of Henry David Thoreau's "Walden" experiment as one of the most endangered historic places in America due to a proposed airport expansion and the proposed development of a nearby plot of land.

Before writing 'Walden,' transcendentalist Henry David Thoreau nearly burned down his hometown with a campfire that grew out of control.

Read the poetry of Henry David Thoreau

Although primarily known for his nonfiction, the New England transcendentalist was also a prolific poet, writing verse that, like his essays, tackled nature, man, and society. The Academy of American Poets has collected 30 of his poems, which you can read for free.

Unpacking Thoreau's diet, which once included a woodchuck

The writer's diet was notoriously simple, preferring an inexpensive combination of rice and vegetables to meat, though he usually ate it when offered. In "Walden," he mentions eating a woodchuck after it got into his beans, which one Thoreau biographer said was likely true.

Why David Attenborough was skeptical about global warming before bringing attention to it

Believing he was "experiencing the untouched natural world" in his early documentary series, Attenborough has admitted that many of his assumptions about human action were incorrect. It was not until attending a 2004 lecture on greenhouse gases and global temperatures that he became convinced of the science.

Climatologists use past data and advanced models to forecast future climate trends

Unlike meteorology, which focuses on weather forecasting over several days, climatology identifies trends in data over periods of 30 or more years. This data can go back millions of years and help refine models to forecast centuries into the future.

Sci-fi writer Jeff VanderMeer writes dystopian fiction about the environment

Noted science fiction writer Jeff VanderMeer discusses his 2014 novel "Annihilation," which uses climate change as a dystopian frame. VanderMeer notes that he’s not interested in cynicism, even though that’s how most people view dystopian literature. “I’m not a fan of fiction that’s totally hopeless,” VanderMeer says. “You find ways of documenting the world as it is and you wind up redefining utopia and dystopia.”

See Harvard’s early history through Indigenous voices

Founded in 1636, Harvard University grew alongside English colonization in Wampanoag lands. In this online exhibit, the Peabody Museum of Archaeology and Ethnology highlights Indigenous voices, interpreting objects such as eel traps and grass baskets.

Biosphere 2 gradually transformed into a lab modeling environmental disasters

Built to establish a self-sustaining habitat, the privately funded facility was taken over by Columbia University in 1995. Closed-system experiments were halted in favor of investigations focused on the effects of climate change, which continued after B2 was donated to the University of Arizona in 2011.

The man who championed the ‘case method’ for higher ed later found it insensitive

The "case method" style of education is core to most MBA programs across the country. Recent research posits that Wallace Donham’s (who is credited with establishing the method as a force at Harvard Business School in the 1920s) views on the method changed in later years.

How is climate change reshaping the Great Northern Wilderness?

This article focuses on how climate change is drastically altering Kluane National Park in Canada and nearby areas in Alaska. Glaciers are struggling: One large glacier is melting so fast that it has redirected a river's flow, a phenomenon that...

John Steinbeck's 'Sea of Cortez,' a travelogue through the Gulf of California, is still used by ecologists today.

Explore a simulation of the greenhouse effect

Investigate how cloud cover, surface albedo—a measure of a surface's reflectiveness—greenhouse concentrations, and atmospheric layers affect the energy balance on a simulated planet. Using either the wave or particle models of light, users can also explore how changes in solar intensity affect planetary surface temperature.

The life of Edward Lorenz, who originally used a seagull in his 'butterfly effect' metaphor

By accidentally finding that rounding one variable to its third decimal place and re-running a weather simulation produced a drastically different two-month forecast, the American mathematician established the field of chaos theory. His paper—"Predictability: Does the Flap of a Butterfly's Wings in Brazil Set off a Tornado in Texas?"—introduced the well-known metaphor for the behavior of chaotic systems. (Some readers may experience a paywall.)

Frank Lloyd Wright's landscape design relied on abstractions

Wright was interested in finding abstract patterns in nature and attempted to match those patterns through the landscaping on his properties. He also often introduced foreign plants into his gardens, a choice that some experts say was a commentary on American identity and aesthetics.

NASA satellite data and sound recordings used to assess rainforest health

This two-minute video describes the work of scientists who are analyzing the impact of repeated forest fires in the Amazon by recording the unique sounds in degraded forests. The team is using acoustic sensors to record sounds of wildlife in the...

This Harvard philosophy professor suggests we should rethink our relationship with animals

Christine Korsgaard, a professor of philosophy at Harvard, wrote a book arguing that humans are not more important than other animals and that we should improve our treatment of them. In her view, we have a duty to value the life of our fellow creatures not just for their utility, but for their existence as sentient and conscious beings.

People who feel connected to nature also report a higher well-being

Based on data collected from over 38,000 participants across 75 countries, spending time appreciating Earth's beauty appears to increase one's satisfaction with life. Whether it's a hike in the woods, a dip in the ocean, or time spent watching the sunset, the findings held true across a wide range of economic, cultural, and environmental contexts. The findings also indicate that connection to nature fosters experiences of being present and attentive, which are strongly linked to mental health.

Land use changes in Connecticut may have helped to enable Lyme's leap into humans

Forest clearing and fragmentation, alongside suburban development, may have contributed to the emergence of Lyme disease in humans in the 1970s. Those changes brought mice, carriers of the disease, into greater contact with people. Climate change is also facilitating Lyme's spread as tick populations survive milder winters and move northward.

Scientists testing how climate change affects plants found, in a years-long simulation study, that poison ivy grew 70% faster with the resulting extra carbon dioxide.

Scientists can determine Earth's past climate conditions by analyzing air trapped in microscopic bubbles within ice cores—columns of compressed snow layers that build up over hundreds of thousands of years.

The Leopold Report was an early blueprint for ecosystem management

The 1963 report, officially known as Wildlife Management in the National Parks, recommended wildlife management and ecological preservation. In 2012, a follow-up report built upon the original paper to guide future park service policies based on scientific findings.

An inventory of ancient trees in the United Kingdom

The world is filled with trees that are hundreds—if not thousands—of years old, and the UK's Woodland Trust believes each one deserves the same protections great cathedrals and castles receive. This active database invites users to peruse...

King's books are now taught by college professors

Stephen King’s horror, fantasy, and science fiction were once considered lowbrow and unworthy of serious academic study. That's changed over the last 50 years, with King courses and symposiums taking place at universities around the world.

Warren Buffett's former professor Benjamin Graham is known as the 'father of value investing,' a strategy in which investors seek to buy stocks trading below their intrinsic worth.

Chaos theory—informally known as the butterfly effect—is the reason why weather forecasts are presented with probabilities rather than certainties.

The 19th-century painters of the Hudson River School were among the first American romantics, with portraits that displayed the natural beauty of the young country.

The use of fungi to detoxify land and water—a process known as mycoremediation—has been used to clean up natural resources affected by the 2025 California wildfires.

Legendary architect Frank Lloyd Wright designed the SC Johnson headquarters in Wisconsin, aiming to make a cathedral-like workplace

Listen to an in-depth conversation on the links between Parkinson's disease and herbicide exposure and the challenging pace of scientific investigation.

After NASA's Voyager 1 captured Earth as a single pixel as it left the solar system in 1990, astronomer Carl Sagan used the image to reflect on humanity's fragility and the responsibility to protect 'the only world we've ever known.'

Explore the animals that populate the depths of the ocean, from fish and coral in the first few hundred feet, all the way down to the bottom of the Mariana Trench.

NBA superstar Victor Wembanyama spent the 2025 summer training with monks in central China to enhance his body and mind.

Studies suggest when you sleep is as important as how much you get, and syncing with your circadian rhythms may lead to less fatigue and improved long-term health outcomes

When you complete a CAPTCHA on a website to prove you are human, you may be unknowingly training algorithms for self-driving cars, whose systems require training data to help identify crosswalks, bicycles, and other outdoor objects.

Some Pokémon have been named after real and fictional organisms, while some real-world species have been named after Pokémon, such as Chilicola charizard and Binburrum zapdos.

SpongeBob exemplifies Aristotle's philosophy for living well because he understands that happiness doesn't come from external factors like money, recognition, or power.

A small portion of The Winstons' 'Amen, Brother,' an obscure '60s gospel record, is the basis for thousands of hip-hop tracks, making it one of the most sampled records ever that's informally known as 'the Amen break.'

Stanford built a Google Maps for the Roman Empire, revealing how much it cost to travel in the ancient world

After the Boston Tea Party, colonists switched to coffee, which became the main morning drink for revolutionaries.

The US Constitution is widely regarded as the longest-standing written national constitution still in force—see how it has influenced rights worldwide.

How the most famous Ebola book, The Hot Zone, which sold 3.5 million copies and was translated into 30 languages, got aspects of the disease so wrong.

Play the role of a student in a game where you try to navigate college and remain debt-free, selecting different income levels, high school experience, race, ethnicity, and more.

As of 2025, the most cited papers in science include a review of graphene, methods to improve image recognition, streamlining electron density calculations, and optimizing protein studies.

Netflix profits when you're not watching, and its movies are designed that way—read a detail-rich critical essay exposing lesser-known Netflix takes

Long before Major League Baseball began allowing instant replay for balls and strikes, an umpire reluctantly used the technology to determine whether a hit was a home run, a move that inadvertently ushered in a new era for the sport.