The government’s secret UFO reading list is revealed. Wow.

FOIA release sheds light on the DOD's own struggle to understand UFOs.

(Vladi333/SONY/Big Think)
  • A just-unclassified Department of Defense reading list on UFOs is stunning.
  • The DOD is wondering if the truth lies in some of the most far-out theories.
  • Science fiction has nothing on science fact.
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Radical theory says our universe sits on an inflating bubble in an extra dimension

Cosmologists propose a groundbreaking model of the universe using string theory.

Getty Images/Suvendu Giri
  • A new paper uses string theory to propose a new model of the universe.
  • The researchers think our universe may be riding a bubble expanded by dark energy.
  • All matter in the universe may exist in strings that reach into another dimension.
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10 science photos that made history and changed minds

These photos of scientific heroes and accomplishments inspire awe and curiosity.

  • Science has given humanity an incalculable boost over the recent centuries, changing our lives in ways both awe-inspiring and humbling.
  • Fortunately, photography, a scientific feat in and of itself, has recorded some of the most important events, people and discoveries in science, allowing us unprecedented insight and expanding our view of the world.
  • Here are some of the most important scientific photos of history:
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Top 5 messages sent to alien civilizations

Between Carl Sagan's laughter, the brainwaves of somebody in love, and a live theremin concert, humanity has sent a lot of data out into the stars.

ESA/Hubble & NASA
  • Ever since we've had the capability, humanity has been desperately trying to make contact with other life in the universe.
  • While we've been beaming out information passively through our television and radio broadcasts, we've also sent more intentional messages.
  • Looking at these messages tells us how humanity wants to think of itself and what kind of relationship we hope to have with alien life.
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Tholins: The red goo critical to life in the universe

Carl Sagan—who first coined the term—was tempted to call them "star-tar."

NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
  • Tholins are a broad group of organic compounds formed when simpler molecules are irradiated.
  • They are extremely common in our solar system, and studies have shown that their properties are incredibly useful to emerging life.
  • By tracking and understanding tholins, we might be able to find extraterrestrial life and even explain how life began on Earth.
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