Big whales, on the other hand, will have big female calves that will grow into long mothers with strong reproductive potential. For baleen whale mothers, investing energy in female calves is the best ...

The newest baby at a popular western Pennsylvania animal park is already 154 pounds and nearly 6 feet tall. Keystone Safari, the 144-acre animal and adventure park near Grove City, announced Aug. 26 ...

ALL RIGHT. WE’RE INTERESTED. THANK YOU SO MUCH, HEATHER. WELL, THE SACRAMENTO ZOO IS WELCOMING A NEW BABY GIRAFFE. HERE IT IS. THE ZOO SAYS AMEERA GAVE BIRTH TO A FEMALE CALF SATURDAY AFTERNOON. BOTH ...

The Center for Whale Research confirmed Sunday that the new orca calf in the J pod, J62, is female. During a sighting on Feb. 8, researchers said J62 appeared to be “doing well” and is “filling out ...

An endangered southern resident orca calf, first discovered on New Year’s Eve, has been spotted again, and the Center for Whale Research is thrilled at the calf’s appearance. “She’s still there. She ...

Subscribe to our newsletter for the latest sci-tech news updates. In 1973, Robert Trivers and Dan Willard proposed that fit female mammals can improve their odds for grandchildren by having males.

Long baleen whale mothers are more likely to have female calves than males, according to a new study led by the University of Washington. The findings contradict a popular evolutionary theory ...