OLDEST LIVING ORGANISM: 200,000 YEARS. A patch of Posidonia oceanica, a species of seagrass native to the Mediterranean, has just gotten its DNA sequenced and its age determined--and as it turns out, some parts of this particular patch are up to 200,000 years old. That easily destroys the previous world record of the oldest living organism, a Tasmanian plant believed to be around 43,000 years old. Ha! A youngun!
200,000 year old sea grass, Posidonia oceanica