Archive
This undated image provided by the American Museum of Natural History shows a shrew-sized Cretaceous-age animal, Ukhaatherium nessovi, which is one of the many mammals used in a mammal tree-of-life study released Thursday. The fossil was discovered in 1994 in the Gobi Desert by the Mongolian Academy and the American Museum of Natural History. A team led by Maureen O'Leary of Stony Brook University looked at 4,541 different characteristics of mammals still around and extinct and traced their DNA and their physical features back until it seemed there was a common -- and hypothetical -- ancestor. They never named the hypothetical creature, not even nicknamed it, but they had an expert draw it based on the features they're pretty sure it had.
Voters Could Elect LA's First Female Mayor
Huge Tornado Kills Dozens Near Oklahoma City
Raw: Rescuers Pull Tornado Survivors to Safety
Oklahoma Gov: 'Hearts Are Broken' After Tornado
Raw: Walking in a Flattened Okla. Neighborhood
Raw: Rescue Workers Search Oklahoma School
Raw: Witness Describes Scene After Okla. Tornado
Raw: Aftermath of Massive Tornado in Oklahoma
Raw: House Burns After Massive Oklahoma Tornado
Raw: Tornado on the Ground in Oklahoma
Split-second Choice Ended With NY Student Dead
White House Backs 'Shield Law' for Media
Wave of Attacks Kills Scores in Iraq
Pug Life on Display at Wisconsin Festival
Company Promises to Make All Snail Mail Digital
Analyst: Tumblr Fills Void in Yahoo's Offerings
Commuters Face Delays After Conn. Train Accident
Raw: Swarm of Tornadoes Slams Plains
Raw: Fierce Bombing in Qusair, Syria
RAW: TV Staff Take Cover From Tornado
