Columbia University

Tackling an Ice Age mystery

In the northern hemisphere, ice sheets ebb and flow in 100,000-year cycles, driven by varying amounts of sunlight falling on Earth's surface as its orbit and orientation toward the sun changes. But astronomical variations ...

dateSep 05, 2013 in Earth Sciences
shares0 comments 0

Volcanoes have shifted Asian rainfall

Scientists have long known that large volcanic explosions can affect the weather by spewing particles that block solar energy and cool the air. Some suspect that extended "volcanic winters" from gigantic blowups helped kill ...

dateNov 03, 2010 in Earth Sciences
shares0 comments 16

New tool makes online personal data more transparent

The web can be an opaque black box: it leverages our personal information without our knowledge or control. When, for instance, a user sees an ad about depression online, she may not realize that she is seeing it because ...

dateAug 18, 2014 in Internet
shares0 comments 0

Researchers Shed Light on Birth of the First Stars

( -- In the beginning, there were hydrogen and helium. Created in the first three minutes after the Big Bang, these elements gave rise to all other elements in the universe. The factories that made this possible ...

dateJul 01, 2010 in Astronomy
shares0 comments 4