What is a placental mammal? Learn more about placental mammals and how having a placenta may have been an evolutionary ...

Kayleigh Nicole Grant, a pro ocean diver, detailed a very close encounter with orca whales, deeming it 'some of the best 30 ...

Orcas, or killer whales, are deadly and beautiful apex predators. Here's when a top economist says the US will see the most ...

WAIKIKI (KHON) — A rare encounter was caught on camera off the Big Island when two massive killer whales — also known as orcas — swam right up to a local fisherman’s boat. It started as a regular ...