Look Out, Phelps: Smithsonian Lion Cubs Pass Their Swim Test

Michael Phelps ended his short-lived retirement in April, but he may want to watch out for a new generation of swimmers: Four lion cubs at the Smithsonian's National Zoo in Washington, D.C.

The four siblings were born to a lioness named Shera on March 2, according to the zoo. As part of growing up, all lion cubs at the Smithsonian must take a swim test, proving they can stay above water then pull themselves onto dry land. Shera's four cubs passed that test on Tuesday.

The zoo posted footage of the test to YouTube, and it's just as adorable as it sounds. Better yet, according to the zoo, "They are now one step closer to going on exhibit in a few weeks with their aunts and half siblings." Read more...