swam

To estimate each animal's size, the researchers also used a drone positioned 25m above the whales as they swam.

Yu, who turned 13 in October, swam an impressive 2:07:41 to claim gold in the women's 200 metre individual medley on Tuesday.

In July 2017, more than six years after the disaster at Fukushima, a tiny robot swam through the unit 3 building.

Hoyos says he held the shark's gaze as it swam away - but then, suddenly, out of nowhere, it lunged at him.

Once collected, the DNA can be preserved in laboratories for years, allowing future scientists to study additional species that once swam through the same waters.