* 'Backward evolution' spawns ape-like people:
A newfound mutation is reported to make people walk on all fours and mouth a primitive language, possibly undoing a million years of evolution or more.
* Galaxy smashups littered early universe, study finds:
Big galaxies formed through repeated mergers billions of years ago, astronomers say.
* Acidifying oceans could cause mass extinction, scientist warns:
Researchers have found that Earth's oceans are gradually becoming a mild acid.
* Your DNA may reveal your last name:
A study in Britain has found that men who share a surname are often related, which could be useful to police.
* Science in images:
A menacing deep-sea anglerfish photographed during a recent Atlantic Ocean expedition by researchers with the Harbor Branch Oceanographic Institution.