Out of all the blue whale sightings worldwide, mother-calf pairs make up just 3.1 percent. This doesn’t make sense; though blue whales are far rarer today than they were before the rise of ...

Scientists may finally have an explanation for the longstanding mystery of why blue whale calves are rarely sighted, an ...

But across various blue whale populations, high pregnancy rates of 33–50% annually seem to contradict the average 3.1% rate of sightings of blue whales involving mother-calf pairs.

But across various blue whale populations, high pregnancy rates of 33-50% annually seem to contradict the average 3.1% rate of sightings of blue whales involving mother-calf pairs.

A blue whale mother and calf are swimming together in the Gulf of California in Baja, Mexico, one of the warm-water places blue whales spend their winter months. Only two blue whale births have ...

A blue whale mother and calf swimming together in the South Taranaki Bight, New Zealand, a rare summer feeding region with many mother-calf pairs.

“This new idea provides an alternative explanation for why some blue whale populations appear to produce very few calves,” Branch said. “It’s not a failure of calf production, it’s ...

A North Atlantic right whale was spotted with her new calf off Florida's east coast Feb. 23. The whales are among the most ...

The Center for Whale Research says it has confirmed a new killer whale calf in a pod of endangered orcas that live off B.C.'s southwest coast is female. It's a piece of good news for J-pod ...