› added 7 years ago

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Mars, the red planet, may not have always been so red. In fact, 3.5 billion years ago it had an ocean that spanned its entire northern hemisphere!

Read more video.nationalgeographic.com

4XpZJ TIL male humans, like other numerous primates, biologically tend to produce and ejaculate more sperm during intercourse when there is a perceived or a known rival competing with them.
Z8ElB TIL Sloppy handwriting of doctors kills more than 7,000 people annually due to getting the wrong medication.
9Yr1D TIL that the R in APR is not an INTEREST rate, but the OVERALL rate of a loan; that is, how much the loan costs fees AND interest!
vyjR TIL the CEO of Susan G. Komen for the Cure had a salary of $459,406 in 2010.
Ooy06 TIL: Thor Christiansen, a Serial Killer who was only caught because his fifth would-be victim survived a shot to the head. She recognised him months later in a bar and reported him to police. Law enforcement then linked him with four other then-unsolved murders that had a similar MO.