7,844 results
7,844 results for: Geology
- Paleontology
China was an ancient-ape paradise
Fossil dig uncovers the oldest known remains of ancestral gibbons
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- 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.
- Animals
Polar bears listed
Polar bear declared "threatened," but Secretary limits decision's impact.
- Planetary Science
Portrait of a Martian crater
An ultrasharp image of part of Mars' Gale crater shows waterborne sediments and volcanic ash.
- Earth
Groundwater use adds CO2 to the air
Pumping out groundwater for crop irrigation or industrial purposes releases planet-warming carbon dioxide into the atmosphere.
- Paleontology
Rodents tell a geologic tale
The sudden appearance of many new species of rodents in Chile about 18 million years ago may have marked the rise of the southern Andes.
- Earth
Erosion accelerates along Alaskan coast
Alaska's northern coast is falling into the sea at an accelerating rate.
- Earth
Hued Afterglow: Fingerprinting diamonds via phosphorescence
The eerie phosphorescence displayed by a rare form of blue diamond can be used as an easy, cheap, and nondestructive way to identify individual gemstones and to distinguish natural blue diamonds from synthetic ones.
- Earth
Finding Fault: Trace of old subduction zone found in Italy
A thick layer of rocks now lying high in the mountains of Italy is the remains of a quake-generating subduction zone active under the sea millions of years ago, a discovery that provides clues about ancient seismic activity along this interface between tectonic plates and insights into what may be happening along many such subduction zones today.
- Humans
From the February 12, 1938, issue
Radio tower reaches for the sky, making a canyon the hard way, and forecasting the next big drought.
- Earth
Oxygen Rocks: Volcanoes spurred early atmospheric change
Earth owes its oxygen-rich atmosphere to a change in volcanic activity about 2.5 billion years ago.
