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.
Armed with mobile phones and the Internet, trusted networks of family and friends spread the news of electoral fraud and escalating tensions in Iran, transfixing the world with photos and videos of demonstrations against the regime.
Producing 'natural' cotton clothing is a huge and filthy global business that, Chinese-commissioned research shows, will be extremely difficult to clean up.