SARS-like viruses may jump from animals to people hundreds of thousands of times a year

Solar cells with 30-year lifetimes for power-generating windows

Astronomers solve 900-year-old cosmic mystery surrounding Chinese supernova of 1181AD

Earth's magnetic north pole has been shifting south at speeds up to 30 miles per year recently. That's prompting some scientists to suggest we're on the brink of a geomagnetic reversal, where Earth's magnetic north and south poles swap places. Such a reversal hasn't happened for 780,000 years.