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08 February 2011, 11:24 PM ET
But group-living gives them an evolutionary advantage during their youth.
08 February 2011, 11:14 PM ET
The fiber is not a pigment, but a structure that reflects blue feather coloring.
08 February 2011, 06:58 PM ET
Living near the north pole can be a winter wonderland for some animals.
08 February 2011, 06:42 PM ET
Some birds and sea life find the Antarctic a surprisingly hospitable place to live.
08 February 2011, 06:00 PM ET
Neurons in the cerebellum form a surprising number of bad connections during early development, according to a study in mice.
08 February 2011, 06:29 PM ET
The ancient past is revealed by the study of fossils, from bugs and fish to human ancestors.
08 February 2011, 06:07 PM ET
Geologic wonders in America that are awe-inspiring for their beauty and the forces that shaped them.
08 February 2011, 05:54 PM ET
Find out what you don't know about sex and how to get the 411.
08 February 2011, 05:51 PM ET
Take a visual tour of a humongous atom smasher in the U.S.
08 February 2011, 05:21 PM ET
The thriftiest of Republican budget proposals would dramatically reduce spending in federal agencies dedicated to science.
08 February 2011, 04:28 PM ET
Bad news is Americans aren't getting any thinner.
08 February 2011, 04:38 PM ET
Ligers and camas and mules, oh my. Animal hybrids are not sci-fi anymore.
08 February 2011, 03:35 PM ET
From baby porcupines to flamingo chicks, we've picked out the most adorable baby animals.
08 February 2011, 03:31 PM ET
The discovery of a trove of potential alien planets, including Earth-like ones, is good news for those looking for E.T.
08 February 2011, 03:42 PM ET
Tough times are in store for Canada's Hudson Bay polar bears if warming continues.
08 February 2011, 03:01 PM ET
The oddball used its lobe-like feet to run across the sand and snag meaty prey.
08 February 2011, 03:01 PM ET
Snow and ice in the U.S. belie the unusually warm winter weather farther north.
08 February 2011, 02:12 PM ET
A new look at a 95-million-year-old fossilized snake reveals two tiny leg bones attached to the slithery creature's pelvis.
08 February 2011, 02:32 PM ET
The brilliantly colored wings of tiny wasps and flies had gone unnoticed by scientists for decades.
02 February 2011, 01:43 PM ET
A huge ice dome erected in Obergurgl, Austria, now serves as a bar. Here's how the engineers built it.
08 February 2011, 01:00 PM ET
Women found men more attractive if they were uncertain about whether the men were attracted to them, in one study.
08 February 2011, 01:01 PM ET
Here's what you need to know to understand the Egyptian protests
08 February 2011, 12:33 PM ET
The Mongol invasion may have caused a small reduction in global CO2, though it was overshadowed by agriculture.
08 February 2011, 10:00 AM ET
Some monkeys at an English zoo make a unique gesture – covering their eyes to ward of interaction – that provides further evidence of animal culture.
08 February 2011, 11:16 AM ET
The almost Queen-bees are the most likely to bully other kids.