From UFOs to psychic powers and government conspiracies, history is riddled with unexplained events. You can turn back now or learn the Stuff They Don't Want You To Know, an audio podcast from HowStuffWorks.com.

Messages From The Deep: The Mystery of Fast Radio Bursts

June 12, 201950 min
For years, fast radio bursts have mystified astronomers across the planet. These millisecond-long blips of intense, unexplained radio signals pop up all over the sky, temporarily outshining radio pulsars despite being perhaps a million times farther away. Before 2013, many astrophysicists doubted that they even existed. Now their existence is undeniable — but what exactly are they? Learn more about your ad-choices at https://news.iheart.com/podcast-advertisers