Euthanization of wildlife in national parks "is an extremely rare occurrence." — -- A bison calf recently had to be euthanized at Yellowstone National Park after visitors put it in the back of ...

A man from Hawaii has pleaded guilty to intentionally disturbing wildlife in Wyoming. Prosecutors said the man saw a bison calf separated from its mother at Yellowstone National Park and tried to push ...

Once again, an endangered orca in Washington state has been seen carrying her dead newborn calf in what appears to be an effort to revive it. Researchers with the Center for Whale Research, Sea Doc ...

SEATTLE (KOMO) — A young female J pod orca calf recently spotted by the Center for Whale Research (CWR) in Puget Sound has now been confirmed by the organization to be the offspring of Tahlequah, the ...

The orca who swam with her dead calf for 17 days in an apparent act of grieving recently gave birth to a new baby, according to Michael Weiss, research director of the Center for Whale Research. The ...

Strong calf muscles propel you forward when walking and running, generate the explosive power needed for jumping, help maintain your balance and stability and protect your feet, ankles and knees from ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Tahlequah, the ...