Spiky slug is may be key in solving the mollusk mystery, scientists say.
Study finds that giant, flightless bird with a head the size of a horse's wandered the Arctic 50 million years ago.
A prehistoric shell that belongs to a glyptodont, a giant armadillo was discovered in Argentina, which dates bback to about 10,000 years ago.
Researchers found that the recently discovered 125-million-year-old mammalian fossil likely suffered from a fungal hair disease.
