Today's Climate More Sensitive to Carbon Dioxide Than in Past 12 Million Years
Geologic record shows evolution in Earth's climate system
Reign of the Giant Insects Ended with the Evolution of Birds
SANTA CRUZ, CA–Giant insects ruled the prehistoric skies during periods when Earth's atmosphere was rich in oxygen. Then came the birds. After the evolution of birds about 150 million years ago, insects got smaller despite rising oxygen levels, according to a new study by scientists at the University of California, Santa Cruz.
Alaska's View of Venus Transit May be Hampered by Cloud Cover
As the world awaits the historic transit of Venus across the face of the sun, an occurrence that will not happen again until 2117, weather in the best viewing location isn't cooperating.
Sunspot 1476, Now Designated Sunspot 1493 Swinging Back into Earth's View
Sunspot 1476, the most prominent feature in our field of view on the sun last month, is now rotating back into view. It now has the designation 1493.