Many experts had thought sharks didn't exist in the frigid waters of Antarctica.

Conservation and historical organizations sued the Trump administration on Tuesday over National Park Service policies that the groups say erase history and science from America's national parks.

Alysa Liu finished the night in third place, Isabeau Levito finished in eighth and Amber Glenn is in 13th place after a popped jump. That puts extra pressure on all of them for Thursday's medal event.

Fast skiers require fast skis. They rely on a team of technicians to wax and prep them for each day's conditions. The U.S. cross-country team has a mobile ski shop that is an unsung hero of their success: Yolanda the wax truck.

At a event in Washington D.C., A U.S. official said a remote earthquake in 2020 was caused by a Chinese nuclear test.