› added 7 months ago

28

TIL only 1 US President has been born after 1946.

Read more wikipedia.org

via reddit.com

7GDO TIL Sperm were first observed in 1677, and were described as “Animalcules”, each containing a miniature yet fully formed human. This came into question when it was pointed out that meant each sperm itself carried sperm.
4XoAo TIL that in 2014 and while trapped in a casino during a blizzard, Bon Jovi put on a full live show for employees and guests who were also trapped.
OoGOX The sky appears blue for a combination of two reasons. Before white light reaches the Earth's surface, the light waves collide with and bounce off of the nitrogen and oxygen atoms in the atmosphere. Different frequencies of light (in other words different colours) are scattered differently. Higher frequencies (blue and purple) are more easily scattered and thus bounce around in all different directions more than lower frequencies (red or orange) do. The scattering of high frequencies alone would cause the sky to appear blue and purple, but our eyes work better at frequencies near the middle of the spectrum (yellow and green). Since the colour blue is closer to yellow or green than purple is, the sky we see appears blue.
e6yb TIL that Leonardo da Vinci often purchased caged birds so that he could set them free immediately.
v1anL TIL that Dr. Fe Del Mundo, the first woman to be admitted to Harvard Medical School and inventor of an incubator made of bamboo, sold her house to create the Philippines' first pediatric hospital and continued making her hospital rounds until she was 99 years old.