Tortoises and crocodiles are seemingly immune from biological aging – a phenomenon known as negligible senescence. Unlike humans, who continue to age after reaching maturity – caused by a gradual accumulation of cellular damage, tortoises, can continue to reproduce at very old ages and show few signs of functional decline as they get older. Instead, […]
According to some forty-million-year-old bones that were discovered in Antarctica, penguins used to be over six feet tall and weighed more than 250 pounds.