Parents are present in more than half the cases

Soon, seemingly healthy smokers could inhale the gas in a new MRI technique to explore early signs of emphysema and asthma.

Experts say the odds are virtually 100 percent that every person on Earth is descended from one royal personage or another.

Women tend to rate themselves significantly less competent at navigating the Internet compared to how men rate themselves. But they are wrong.

The hole in Earth's protective ozone layer won't repair itself until about two decades later than had been expected, scientists announced yesterday.

The Greenland ice sheet showed unremarkable melting in 2005.