Each weekday, Life's Little Mysteries rounds up the most bizarre news from around the world.

Walk Like a Man: A gorilla in a U.K. zoo gets around on two legs, walking upright like a human. We've got video and an explanation.

Case Closed: Wildlife officials determine what killed all those blackbirds in Arkansas earlier this month.

Medieval Marijuana: Marijuana-launching trebuchet discovered along the U.S.-Mexico border.

Choose Your Poison: Four Loko more dangerous than soda pot.

Flat Note: Aspiring teen art student cops to placing piano on Miami sand bar. "I don't like it be considered as a prank," he said. "It's more of a movement." Art students. Sigh.

Stealthy as a Squid: Researchers think light-bending squid could inspire new stealth technologies for soldiers.

This article was provided by Life's Little Mysteries, a sister site to LiveScience.