On February 4, scientists monitoring lion populations in Uganda captured nighttime thermal drone footage of two lions—brothers dubbed Jacob and Tibu by the Uganda Wildlife Authority—swimming across ...

Good morning. I'm Rachel Martin. A Russian swimmer has reportedly broken the world record for longest under-ice swim. Her name is Yekaterina Nekrasova, and she swam 279 feet beneath the ice of Lake ...

A record-breaking swim by two lion brothers across a predator-infested African river has been documented in a study co-led by Griffith University and Northern Arizona University. Dr Alexander ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Two lion brothers ...

After swimming around the island of Manhattan in 2021, Liz Uribe has topped herself once again. Originally from Tucson, Ariz., Uribe moved to Iowa to attend graduate school at the University of Iowa ...

Yekaterina Nekrasova swam 279 feet beneath the ice of Lake Baikal in Siberia. She wasn't allowed to use a wet suit or flippers — just a regular bathing suit. It took her about a minute and a half.