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May 29, 2015 02:45 PM ET // Leonard David,
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.
May 14, 2015 07:00 AM ET // Charles Q. Choi,
Astronomers may have solved the decades-long cosmic murder mystery of what kills most galaxies in the universe: They are strangled to death, so they can no longer create new stars.
May 14, 2015 02:00 PM ET // Irene Klotz
Astronomers have found a quartet of quasars embedded in a single cloud of cold gas, a discovery that challenges currently held theories about how these rare objects form.
Feb 16, 2015 11:00 AM ET // Irene Klotz
Amateur astronomers gazing at Mars discovered gigantic plumes soaring more than 125 miles above the planet’s surface, a phenomenon that so far defies explanation.
Jan 23, 2015 03:00 PM ET // Nola Taylor Redd, Contributor
Giant bubbles of gas that erupted from the core of the Milky Way galaxy millions of years ago are expanding out into space at mind-blowing speeds, according to new observations that may help reveal how the strange balloon-like lobes formed.
Jan 6, 2015 01:43 PM ET // Discovery News
Obsidian tools tell a different story than the theory that the Rapa Nui civilization collapsed all at once amid mass starvation.
Nov 19, 2014 06:45 AM ET // Benjamin Radford
A young boy is claimed to have lived a past life as a Marine killed in combat, though psychology can likely explain this mystery.
Aug 7, 2014 11:00 AM ET // Discovery News
Giant gypsum crystals -- some of which are in excess of 30 feet long and half a million years old -- are found deep within the Naica mine in Chihuahua, Mexico and are renowned for their spectacular beauty.
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