Teeth or bristles

Cetaceans divide into two groups in the manner they catch their food using teeth or bristles Most cetaceans have triangular teeth and feed on fish or squid. These include dolphins, porpoise’s narwhals and sperm whales. A number of whales, including most of the largest, feed by filtering crustations and shoaling fish through large plates of bristles called baleen. The baleen whales open their mouths to … Continue reading Teeth or bristles

Menopausal Moms: A Mammal Mystery

Ocean-going mothers everywhere deserves a special salute.They give birth well into their twilight years while human females call it quits  40 years earlier.In fact, human females are the oddballs here and a bit of a puzzle. Evolution favors those who leave the MOST offspring. Yet the average human mother has her last child at the age of 38 — with menopause and the loss of … Continue reading Menopausal Moms: A Mammal Mystery