Environment

Danish scientist Kristine Bohmann collects air samples in the Copenhagen Zoo’s tropical rainforest house.

Scientists Pull Animal DNA Out of Thin Air

The new method, tested at two zoos, could revolutionize the study of biodiversity in the wild

Though pikes (picture above) had the highest concentration of methylmercury in their bodies, they recovered faster than other species. 

Fish Can Recover Surprisingly Quickly From Mercury Pollution

If the chemical stops leaking into freshwater ecosystems, its concentration in some fish species can drop by more than 75 percent

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The Ten Best Science Books of 2021

From captivating memoirs by researchers to illuminating narratives by veteran science journalists, these works affected us the most this year

Plastic makes up 80 percent of all marine debris found, from surface waters to deep-sea sediments 

The Great Pacific Garbage Patch Hosts Life in the Open Ocean

Coastal plants and animals are thriving on the plastic debris, posing potential ecological risks

Dozens of Smithsonian Institution professionals share their favorite reads from this year.

Smithsonian Scholars Pick Their Favorite Books of 2021

The writings of many fine authors support the research and ambitious undertakings of an Institution rising to the challenges ahead

Carbon emissions from burning fossil fuels fell more than 5 percent last year but jumped back up in 2021.

Global CO2 Emissions Have Returned to Near Pre-Pandemic Levels

A new report shows carbon emissions from burning fossil fuels jumped by more this year than they fell during 2020

Artists paint a mural near the Scottish Events Centre, which will be hosting the Climate Summit starting October 31 in Glasgow, Scotland. 

Five Important Questions About COP26 Answered

Representatives from nearly 200 nations are expected to meet and report on climate change promises made in the Paris Agreement

A passenger in a white truck photographs several capybaras in a yard in a gated community in Tigre.

Rodents of Unusual Size Take Over Gated Community in Argentina

Weighing up to 175 pounds and growing to four feet in length, capybaras are reclaiming habitat that once was theirs in South America

Africa could lose rare glaciers like Mount Kilimanjaro's Southern Ice Field within 20 years.

Africa's Last Rare Glaciers May Soon Disappear

The continent is especially vulnerable to the impacts of climate change, despite its population contributing little to the problem

Colombian wildlife officials hope to control a rather large invasive species—the hippo—with contraceptive drugs.

Officials Use Contraceptives to Control Pablo Escobar's 'Cocaine' Hippos

Smuggled into Colombia by the drug kingpin in the 1980s, the African mammal is now a growing environmental threat in the South American country

Smithsonian scientist Genevieve Noyce conducts a plant census in a wetland at the Smithsonian Environmental Research Center in Maryland.  

How the Smithsonian Grapples With Climate Change

As a hub for research and education, the Institution is poised to help the world find solutions to the global challenge

American bumblebees are a vital pollinator for wildflowers and crops, and their decline could have severe consequences for the environment.  

The American Bumblebee Has Nearly Vanished From Eight States

In two decades, the insect's population has declined by nearly 90 percent due to a combination of threats, including habitat loss, pesticides and diseases

Plastic debris covers much of the sand on Henderson Island.

Plastics Make Beaches Hotter During the Day and Colder at Night

A study of remote islands shows that debris alters sand temperatures

Fishers gather rope and nets on a fishing boat in Gaza in May 2021. 

With Ropes and Nets, Fishing Fleets Contribute Significantly to Microplastic Pollution

Synthetic ropes release 'substantial amount' of plastic particles into the sea during each use, according to new research

A cluster of western monarch butterflies clings to a branch as it overwinters in California.

The Best Place to Watch Monarch Butterflies Migrate Might Be This Little California Beach Town

Thousands of western monarchs migrate to Pismo Beach each fall to escape winter cold, but climate change threatens the species' survival

Enticed by a sweet treat, a cow learns to use the "MooLoo," a latrine for cattle, where excrement can be collected. The only question is: can this technique work on a larger scale?

Researchers Potty Trained Young Cows, a Promising Measure to Reduce Greenhouse Gases

One cow pees up to eight gallons a day; training them is easy, and capturing and treating the waste could make a difference

Environmental scientist Alexandra Ordoñez Alvarez from the University of Queensland collects data in Far Northern Great Barrier Reef on Ashmore Bank.

Scientists Complete the First Map of the World's Coral Reefs

Nearly 100,000 square miles of the organism have been charted in high detail to create a tool for conservationists to help save them

Grizzly bears in coastal British Columbia are more closely linked to Indigenous groups than previously realized.

Grizzly Bear Territories in Canada Match Maps of Indigenous Language Families

DNA analysis shows a distinct relationship between three distinct groups of grizzlies and Indigenous populations with different languages

The creation of clouds over forested areas shows that reforestation would likely be more effective at cooling Earth’s atmosphere than previously thought, a Princeton study says.

Planting Trees Encourages Cloud Formation—and Efficiently Cools the Planet

New study examines cooling effect of clouds produced by deciduous forests under pressures of climate change

Pictured: A hydrogen fuel station sign in Osnabrück, Lower Saxony in Germany.

'Blue' Hydrogen May Not Be a Very 'Green' Energy Source After All

Climate scientists conclude this so-called clean alternative has a 20 percent larger carbon footprint than natural gas and coal when used for heat

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