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Chris Hadfield
Retired Canadian Astronaut & Author
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YoYo Theory of Black Holes as Stars in Transition to Extreme Density and Back

Stars operate in a yoyo fashion where a super nova represents one extreme and an almost infinitely dense black hole the other extreme.  This could also be thought of as a pendulum with super nova and ultimately dense black hole as the two ends of the pendulum motion.  Thus the matter of stars is neither created nor destroyed but just alternating between density levels.

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The psychology of psychopathy: An inside look at the psychopathic brain

A 2017 University of Wisconsin-Madison study was the first of it's kind to show structural differences in the psychopathic brain.

Credit: State Archives of Florida, Florida Memory / Big Think
Mind & Brain
  • According to a 2017 study led by the University of Wisconsin-Madison, psychopaths have reduced connections in the areas of the brain that control fear, anxiety, empathy and sentimentality.
  • Psychopathy is typically diagnosed using a 20-item checklist called the Hare Psychopathy Checklist.
  • Psychopathic tendencies could be considered "warning signs" of psychopathy, but it's important to note that not everyone who shows psychopathic tendencies becomes a psychopath.
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Space travel could create language unintelligible to people on Earth

A new study looks at what would happen to human language on a long journey to other star systems.

Cylindrical space colony.

Credit: NASA Ames Research Center.
Surprising Science
  • A new study proposes that language could change dramatically on long space voyages.
  • Spacefaring people might lose the ability to understand the people of Earth.
  • This scenario is of particular concern for potential "generation ships".
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Your emotions are the new hot commodity — and there’s an app for that

Many of the most popular apps are about self-improvement.

Drew Angerer/Getty Images
Personal Growth

Emotions are the newest hot commodity, and we can't get enough.

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