Researchers find that disappointed voters on Election Night 2008 experienced a dip in testosterone levels. How do they know? They measured the voters' spit, of course.
A leading canine researcher says dogs understand more than 150 words and can count up to four or five. He has compiled a list of the world's smartest dogs. See if your pooch cracks his Top 7.
Professor Shigeru Watanabe from Keio University in Japan, writing in the journal Animal Cognition, says pigeons can use color, pattern and texture to distinguish good paintings from bad.