Hillary Clinton has discussed declassifying government information about UFOs--but why, and what does that mean?
Worm poop is so plentiful in parts of South America that it can change entire landscapes.
A strange 'lake' of super salty dense water is discovered on the bottom of the Gulf of Mexico, where salt deposits bubble up along with methane.
The Tully monster's classification has perplexed researchers since 1958.
The chance discovery is providing new insight into one of nature’s enduring puzzles.
Conspiracy theorists trying to decode abstract video clips in a mysterious, vanishing YouTube channel.
Powerful transient radio flashes in the universe pop off randomly and appear to defy explanation, but astronomers have made a breakthrough in pinpointing the exact source of one of these fast radio bursts.
A global team of vigilant satellite watchers has caught the U.S. Air Force's robotic X-37B space plane on camera as the craft circles Earth on its fourth mysterious mission.
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