All Stories by Sid Perkins
- Planetary Science
Hop, skip and a jump
Less gravity on Mars means wind-driven grains of sand travel up to 10 times faster than those blowing along Earth’s surface, new analyses suggest.
- Earth
Climate fix could deplete polar ozone
Scientists seeking to cool Earth’s climate by injecting sulfuric acid droplets high in the atmosphere might trim rising temperatures but could also destroy much of the ozone in polar regions, a new study suggests.
- Earth
Melt pond falls through ice in Greenland
A lake of meltwater atop Greenland's ice sheet wedged open a crack in the underlying ice that drained the lake dry.
- Life
Elephant kin liked the water
Moeritherium, ancient relatives of modern elephants, may have spent much of their time in lakes, rivers or swamps.
- Environment
Down with Carbon
Scientists are exploring strategies for capturing carbon dioxide and storing it safely away in order to limit the levels of that greenhouse gas in the atmosphere.
- Earth
Britain’s biggest meteorite strike
An unusual layer of rock found along Britain's northwestern coast formed from the debris thrown out of a crater when a meteorite struck nearby more than 1 billion years ago.
- Paleontology
Salty Old Cellulose: Tiny fibers found in ancient halite deposits
Researchers have recovered microscopic bits of cellulose from 253-million-year-old salt deposits deep underground.
- Earth
New Recipe for Pollution Stew: Another chemical culprit adds to ozone
A reactive chemical in urban air cleans up some pollutants but could introduce another.
- Earth
Weather maker
The North Atlantic's Gulf Stream affects the overlying atmosphere more strongly than previously suspected.
- Earth
Ocean ups and downs—the long view
Sea level has dropped about 170 meters in the past 80 million years, thanks in part to the thinning of ocean crust and the formation of land-based ice sheets.
- Earth
Ancient Chasm: Parts of Grand Canyon may be 17 million years old
The chemical composition of mineral formations in caves along the Grand Canyon may provide fresh insight into the chasm's history, including its age and the rate at which it was carved.
- Tech
Finding mass graves from on high
Aerial surveys that scan the ground at many wavelengths, some visible and some not, may offer a way to quickly and easily detect mass grave sites.
