WASHINGTON - Ever wondered what makes us look older? A new study has revealed that wrinkles and sagging result not only from changes in the skin, but also from aging-related changes in the facial bones.

WASHINGTON - Scientists at the University of Michigan have discovered new evidence that our genes play a vital role in determining our susceptibility to depression.

LONDON - A team of palaeontologists has come to the conclusion that the world's oldest known human ancestor was threatened by sabretooth species.