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What makes a rooster decide to crow?

The answer from scientists is that it has something to do with an alarm clock.

Editors of EarthSky

January 9, 2012

Genetically engineered silkworms with spider genes spin super silk

Super strong silk from genetically engineered silkworms might be useful for sutures, artificial limbs and parachutes.

Deborah Byrd

January 7, 2012

Deep in Earth’s interior, minerals behave unexpectedly

Scientists have discovered that iron oxide conducts electricity more readily under the extreme pressures and temperatures found in Earth’s deep interior.

Deanna Conners

January 5, 2012

Satellite shows ghost shoreline of Lake Buchanan in Texas

By the morning of December 28, 2011, Lake Buchanan stood roughly 23 feet (7 meters) below its historic average for the month.

Deborah Byrd

January 5, 2012

Missing winter? For U.S., it’s coming

For most of the U.S., winter 2011/2012 has been fairly quiet and mild so far. But the models are all hinting at a significant change to come.

Matt Daniel

January 5, 2012

2011 was a year of tornadoes

Here's a look at the amazing and record-breaking year for tornadoes - 2011 - in the United States and the world. Many videos in this post.

Matt Daniel

January 3, 2012

Wild chimps sound alarms for unaware friends

Chimps are more likely to make alarm calls when snake is near when other chimps are unaware of the danger, the new evidence shows.

Deborah Byrd

January 2, 2012

Powerful 6.8 magnitude earthquake shakes Japan

Buildings swayed in Tokyo on this New Year's Day 2012 as a 6.8-magnitude earthquake struck in the ocean near Japan.

Deborah Byrd

January 1, 2012

Kieran Mulvaney on why polar bears are cool

Journalist Kieran Mulvaney became fascinated with polar bears a decade ago when he was in Alaska on assignment. His new book is called "The Great White Bear."

Beth Lebwohl

December 31, 2011