Imagine giving birth to a 1360 kg baby. That's practically the weight of a small car. But it's the typical size of a newborn blue whale ... A fourth of their mother's body weight.

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.

The aim of the Blue Planet II team was to capture an intimate family portrait of sperm whales ... and baby. Over the course of several years René gathered tender moments between a mother and ...

One of the world's most endangered whale species is experiencing a mini baby boom off the US state ... have seen three North Atlantic right whale mother and calf pairs in Cape Cod bay.