How can you tell at home whether your cat is pregnant? There's a strong probability that your cat is pregnant if she recently went into heat or was exposed to an intact (unneutered) male cat. Unspayed female cats are referred to as "pregnant queens" because of the physical and behavioral changes they exhibit during pregnancy.
While ravens do not occur in China's capital Beijing today, a new study analyzing fossil bird bones from the UNESCO World Heritage Zhoukoudian "Peking Man" site demonstrates that ravens lived in western Beijing at the same time as some of its famous ancient human inhabitants.
A team of paleontologists from the University of Canterbury has discovered a remarkably intact fossil of one of the earliest ancestors of a group of birds now restricted to the tropics. Tropicbirds, now represented by only three living species, have a long fossil record spanning at least 62.5 million years, with the oldest...
Turtles’ shells contain a chemical record of the environment—including highly enriched uranium, an indicator of nuclear weapons development. What can we learn from these accidental archivists?
Now researchers think they know why. Several years back, during a fishing expedition in the Florida Keys, biologist Lori Schweikert came face to face with an unusual quick-change act. She caught a pointy-snouted reef fish known as a hogfish and placed it on her boat's deck. However, when she later
These rare kills in Washington State have biologists searching for answers. “Everyone always assumes wolves have the upper hand,” says one scientist. “But that’s not always the case.”...
Adrienne Farricelli (CPDT-KA) reveals a simple training system that unleashes your dog's 'hidden intelligence' to eliminate bad behaviors and dramatically boost obedience.