Will the U.S. Ever Catch a High-Speed Train?
Over 20 countries have high-speed train travel, carrying 1.6 billion passengers a year. The United States is lagging behind.
The Meaning of Methane on Mars
Curiosity rover's recent report of methane on Mars isn't the first time the gas has been indicated. Does it necessarily mean that Mars harbors life?
Meet the Man Behind the Peony
In China, gramophone and camera in tow, botanist and explorer Joseph Rock collected seeds from the tree peony that bears his name.
How Language and Climate Connect
While we’re losing biological diversity, we’re also losing linguistic and cultural diversity at the same time. This is no coincidence.
Should the Moon Landing Site Be a National Historic Landmark?
Some archaeologists argue it’s essential to preserve the history of lunar exploration. But would it represent a claim of U.S. sovereignty over the moon?
Will You Ever Fly in a Plane Propelled by Plants and Seeds?
Airlines have already flown planes fueled with biofuel-petroleum mixes, and more are coming.
How Does a Scorpion Decide When to Sting?
There are actually two decisions to make: whether to sting at all and whether to use prevenom or full venom.
Mount Everest’s Death Zone
The zone above 8,000 meters is known among mountaineers as the “Death Zone.” Why do most deaths in the high mountains occur at these extreme heights?
A Century After They First Appeared, Electric Boats Are Making a Comeback
In the late 1800s, electric boats were a promising new technology. They are now enjoying a revival.