Fossils of an ancient sea creature are the oldest evidence of right-handedness

By Mindy Weisberger, CNN (CNN) — If you happen to be right-handed, you may be able to trace the origins of that trait to a wormlike animal that lived about 550 million years ago and had a tendency to bend to the right. Spriggina floundersi appeared in oceans during the Ediacaran Period (635 million to