The sun shimmers across the glassy surface of Blue Hole, a heart-shaped underwater sinkhole, as two divers prepare to descend into its treacherous, turquoise abyss. Entering the twilight zone “feels ...

Erich von Däniken, the Swiss author whose books on the alleged extraterrestrial origins of ancient civilizations brought him ...

A deep-sea search for Malaysia Airlines Flight 370 has begun in the Indian Ocean, reviving efforts to solve one of aviation’s greatest mysteries ...

A Texas-based robotics company is leading the charge in a decade-long search to find answers to one of the most iconic ...

A former park ranger has been searching for decades for an original copy of a historic WPA poster for Great Smoky Mountains ...

Nearly everything in the universe is made of mysterious dark matter and dark energy, yet we can’t see either of them directly ...

On Wednesday, the Malaysian government said a vessel began a new search operation for the missing plane, reigniting hopes the ...

Ed Wilkinson and Bart Schleyer were as tough and experienced as they come, which makes their deaths all the more mysterious.

After nearly a century, the disappearance of Amelia Earhart while she was attempting to fly around the world remains one of the greatest unsolved mysteries of the 20th century. For decades, many ...

WEST LAFAYETTE, Ind. — It's one of history's greatest mysteries. On July 2, 1937, aviator Amelia Earhart and navigator Fred Noonan disappeared over the Pacific Ocean while attempting to make the first ...