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Updated February 17, 2022
  Hubble Ultra Deep Field

Image: This 3.1 x 3.1 arc minute image required 800 exposures taken during the Hubble Space Telescope's 400 orbits around Earth. The total exposure time was 11.3 days (between September 24, 2003 and January 16, 2004). In this very small area of the southern sky located in the constellation of the Fourneau, there are about 10,000 galaxies.
Credit: NASA, ESA and S. Beckwith (STScI) and the HUDF team

    
  Rare Earth

Image: the Earth photographed by Apollo 8 between 12/21 and 12/27/1968.

    
  Hubble Ultra Deep Field

Image: Artist's impression of the Milky Way showing the position of the Sun in the Orion Arm, a protected area of our Galaxy's habitable zone.

    
  magnetar

Image: a gamma-ray burst could have contributed to the extinction of the Ordovician-Silurian (∼445 Ma). Credit NASA Gamma-ray burst light bubble.

    
  Metaverse

Image: Parallel worlds with artificial intelligence indistinguishable from reality end up producing their own simulations!!!

    
  Plato's Allegory of the Cave

Image: The allegory of the cave is a metaphorical representation of the ignorance that characterizes the human condition.  The allegory features men chained and immobilized in a cave since birth. They have their backs to the entrance and have never seen any real objects, they have only seen the shadows of objects projected onto the cave wall.

 
           
Toumai our ancestor,
old 7 million years...
The bipedalism
in hominids...
   
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