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TIL measuring 4086mi^2, the largest salt pan Salar de Uyuni in Bolivia is so flat that rain can’t drain, creating the world’s largest natural mirror. It’s also 5x better for satellite calibration than the surface of the ocean, and an elevation measurement accuracy of 0.8 inches

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7rAQ7 Today I learned that Christopher Reeve was asked by the Democratic Party to run for Congress. He replied "run for Congress? And lose my influence in Washington?"
mmEM TIL that an atomic bomb cameraman ripped his safety goggles a split second before the bomb exploded. He immediately covered his eyes with his hand and saw his hand’s bones through his closed eyelids just like in an X-ray.
e0r7g TIL Yawning is more contagious among people who are emotionally close. An experiment found family members showed the greatest contagion, in terms of both occurrence of yawning and frequency of yawns, while strangers and acquaintances showed a comparatively longer delay in the yawn response.
BYMd TIL when Eagle of Apollo 11 was landing on the moon, the automated landing program tried to land in boulder filled West Crater. Neil Armstrong quickly switched to manual control, landing safely on a flat surface. Upon landing, the Eagle only 30 seconds of fuel remaining.
VB1Z0 TIL that in 1983, a legal battle over the James Bond franchise resulted in two movies being released simultaneously in theaters: 'Never Say Never Again', starring Sean Connery, and 'Octopussy', starring Roger Moore.