The Most Outrageous U.S. Conspiracy Theories

Extraterrestrial Signal

On August 15, 1977, astronomer Jerry Ehman recorded a radio signal using the Big Ear telescope at Ohio State University. The sound that he heard was so loud that he quite literally wrote down, "Wow!" on the printout. The sound lasted for 72 seconds.

The More You Know

Nearly 15 percent of Los Angeles is used as a parking lot.
Water makes different pouring sounds depending on its temperature.
Only 5% of the ocean has been explored.
The majority of polar bears live in Canada—not in the Arctic.

Post originally appeared on Upbeat News.