New space dangers found by NASA in astronaut blood

A study found alarming changes in the bodies of astronauts aboard the International Space Station.

Credit: NASA
  • A NASA study reveals new dangers to the human body in space.
  • The absence of gravity caused changes in people's blood flows.
  • Some had blood going in reverse while others developed clots.
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Why would NASA outsource missions to SpaceX?

When it comes new PR disasters, NASA isn't taking any risks.

  • Tragedies at NASA, such as Challenger and Columbia disasters, have impeded the organization from taking risks, critics say. Indeed, in terms of PR, these tragedies were particularly baleful.
  • Although NASA was once a contractor, its staff spearheading missions, today they are more a client. SpaceX is basically selling NASA a ride to the ISS.
  • Essentially, NASA has put the risk on private companies — if anything bad happens, it's on SpaceX, for example. This switch may better further space colonization goals, though, because the private sector has more flexibility, in terms of how business is conducted. Also, NASA, as a national entity, avoids the pall of a possible disaster.
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Is the universe controlled by gigantic structures?

The idea that celestial objects exist within utterly immense cosmic structures is becoming inescapable.

Image source: Mike Rosecope/procy/Shutterstock/Big Think
  • New findings in astronomy are making some astronomers doubt our basic model of the universe.
  • Alignments of celestial objects suggest that they may be embedded in large-scale structures.
  • Galaxies too far apart to be influencing each other are moving through space together.
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Neil deGrasse Tyson: Want to prove aliens exist? Do this.

Neil deGrasse Tyson wants to believe. He just needs to see the evidence first.

  • Are UFOs actually alien spacecraft visiting Earth? They might be, says Neil deGrasse Tyson, but if you want to make that claim you better bring the evidence to support it.
  • Eyewitness testimony is the lowest form of evidence. To measure what is true or not true in the world, we require data -- and when it comes to alien appearances, it's as astronomer Carl Sagan said: "Extraordinary claims require extraordinary evidence."
  • So what can you do to prove your alien abduction story? Take selfies, live-stream video to the internet, and if you happen to find yourself in a spacecraft getting your "gonads poked", then grab an item from the alien lab as evidence before they release you back on Earth. Neil deGrasse Tyson wants to believe, but not until he sees the data.
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WATCH: Dinosaurs traveled other parts of Milky Way than humans

Dinosaurs never left Earth, but they still traveled millions of miles through the Milky Way galaxy.

Dr. Jessie Christiansen
  • A new video shows how life has evolved on Earth during the planet's most recent revolution around the Milky Way, also known as one galactic year.
  • A galactic year is about 220 million years, and it was the beginning of the Jurassic period the last time Earth was at this point in its revolution.
  • How will Earth look on its next galactic birthday? It's impossible to know for sure, but a few events seem inevitable.
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