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Science / Our Planet

Australia has a long record of devastating tropical cyclones, such as Yasi, which made landfall in Queensland in February 2011. But a new study finds such storms to be on the decline.

Australian Cyclone Activity Hits Record Low Levels

Climate change may explain the recent drop, scientists say

The New Madrid seismic zone, in the center of the United States, is highlighted bright pink in this earthquake hazard map created by the U.S. Geological Survey in 2008, reflecting the increased likelihood that a strong earthquake could strike that region.

Large Earthquakes Still Possible in the Central United States

The region shook in 1811 and 1812, and scientists say it could happen again

A three-toed sloth.

New Research

What Drives a Sloth’s Ritualistic Trek to Poop?

Scientists trace the odd bathroom behavior to relationships with bacteria and moths that inhabit their fur

The deadly conflict between the advocates and ranchers was over virgin forestland near Nova Ipixuna, Brazil.

Why Do Environmentalists Keep Getting Killed Around the World?

The brutal 2011 slayings of two local rainforest defenders in the Amazon underscore the risks of activism in Brazil and the rest of the world

Clouds of haze rise above China, largely the result of the country's massive manufacturing industry.

Air Pollution in China Is Spreading Across the Pacific to the U.S.

China is sending detectable levels of pollution to the U.S., but a significant fraction of it results from manufacturing products for American customers

Please look but don't take.

Beach Tourists Who Collect Shells May Be Harming the Environment

At one beach in Spain, increasing numbers of tourists have caused a 60 percent decline in shell abundance, potentially disrupting the aquatic ecosystem

California redwoods can live for more than a thousand years.

Save the Big Trees!

A large tree grows more quickly and sucks up a lot more carbon than a smaller one, scientists find

Northern bald ibises in a classic flying "V" formation.

Scientists Solve Mystery of Birds’ Flying V

Migrating birds flap in and out of rhythm depending on where they are in formation

A dingo walks along a road in southern Australia.

Maybe Dingoes Don’t Deserve Their Bad Rap

Studies show that Australia’s “favorite scapegoat” most likely didn’t kill the Tasmanian tiger

A grey wolf in Yellowstone National Park.

Top Carnivores Help Shape Nearly Every Aspect of Their Environment

From controlling other animals’ numbers to affecting carbon storage, the predators’ vital roles in ecosystems justify their conservation, scientists say

This Orb-Shaped Solar Power Device Works On The Cloudiest Days

The use of a clear “ball lens” to concentrate light into a beam of energy may improve solar power efficiency by up to 50 percent

Nuclear tests, such as Operation Redwing in 1956, deposited radioactive plutonium and cesium in the atmosphere.

Plutonium From Nuclear Tests Lingers in the Atmosphere

Don’t worry, scientists say that it’s not a threat to human health but instead could be a marker of how air circulates

Ask Smithsonian 2017

What Happens to All the Salt We Dump On the Roads?

In the U.S., road crews scatter about 137 pounds of salt per person annually to melt ice. Where does it go after that?

Five Reasons Why You Should Probably Stop Using Antibacterial Soap

As the FDA recently noted, antibacterial products are no more effective than soap and water, and could be dangerous

Earthquake lights seen Tagish Lake, in the Yukon Territory, in 1972. Large orbs are visible in the foreground, while smaller ones (highlighted by arrows) are seen higher up.

Why Do Lights Sometimes Appear in the Sky During An Earthquake?

Scientists have a new hypothesis to explain the mysterious phenomenon—one that could allow the lights to serve as warning for an impeding quake

A tobacco hornworm caterpillar chowing down on a wild tobacco plant in the Great Basin Desert, Utah

Caterpillars Repel Predators With Second-Hand Nicotine Puffs

As far as spiders are concerned, caterpillars have a case of very bad breath

A black mangrove has taken root in this salt marsh in St. Augustine, Florida.

Fewer Freezes Let Florida’s Mangroves Move North

Climate change has extended the range in which mangroves can survive the winter, letting them take root farther north and invade salt marshes

Six Things We Learned About Our Changing Climate in 2013

Scientists are in agreement that human activities are altering our climate—and it’s an illusion that the pace of changes seems to have slowed down

Orbus chirurgia, a scorpion used for semi automated and remote surgery.

Art Meets Science

An Artist Imagines the Techno-Evolved Creatures of the Future

Vincent Fournier has seen the future of evolution, in which humans design animals for their own uses

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The Coolest Science of 2013, in GIFs

This year, we saw dissolving electronics, flying meteors, gravity-defying chains and rotting pineapples

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