It’s hard to picture a creature so immense that a person could stand inside one of its arteries, yet that’s the reality of ...

In the animal kingdom, the creatures with the biggest hearts – relative to their size – are often the tiniest among us.

The blue whale, the largest creature on Earth, has the heart that is famously compared to the size of a small car or piano.

WASHINGTON (Reuters) - Using a bright orange electrocardiogram machine attached with suction cups to the body of a blue whale, scientists for the first time have measured the heart rate of the world's ...

You will find a wide and varied world full of life when you descend into the deep blue sea. Among the ocean’s inhabitants, whales and dolphins have a particular place in our hearts and fantasies. In ...

“The blue whale is the largest and loudest animal on Earth.” The blue whale is the largest animal on Earth and likely the largest animal ever to have lived. While this ocean mammoth is dubbed “blue,” ...