(CNN) A kayaker has a close-call with an alligator, a comet pays Earth a visit, and Simone Biles wows us AGAIN! Here are the must-see videos of the week.
An alligator charges at a kayaker and gives him quite a scare. The man captures the encounter on camera as he paddles the Waccamaw River in North Carolina.
In 2008, Mountain Lake, made famous by the 1987 film "Dirty Dancing," dried up. In 2020, it's filling back up. Scientists have studied it and discovered it's the only lake of its kind.
Bridger Walker, a courageous 6-year-old boy, shielded his sister from an attacking dog. The young "Avengers" received a personal message from Chris Evans celebrating the boy's heroic act.
Don't miss your chance to witness a truly stellar moment! The NEOWISE comet will be visible at certain times of the day during July and August. According to NASA, it contains particles that are more than 4 billion years old.
Simone Biles is reminding us why she's the most decorated gymnast in world championships' history. She posted a video of her performing some stunning moves that she says she hadn't attempted since she was 13 years old.