TIL that James K. Polk is the only US president who pledged to serve only one term during his campaign. He was known for fulfilling all his major promises and died 3 months after his term ended, making his retirement the shortest. He is also the only speaker of the house to be elected as president.
TIL there are 2 billion parking spots in the U.S. for about 200 million cars. The area of parking per car in the United States is thus larger than the area of housing per human.
TIL of the forgotten Winchester 1873, which was found in the Great Basin national park in 2014. No one has been able to trace it back to an owner and there is no clear reason why it was abandoned. It remained undiscovered for over 130 years.
TIL at the time of his fatal heart attack rapper Big Pun weighed 698 lbs (317 kg). About 10 years earlier he weighed around 180 lbs (~80 kg).
TIL that Spanish scientists have developed a 3D bioprinter which can print sheets of functional human skin for use in research or even transplants
TIL Idi Amin, dictator and commonly known as the "Butcher of Uganda", reportedly boasted that he kept the decapitated heads of political enemies in his freezer, although he said that human flesh was generally "too salty" for his taste.
TIL About a third of all fish and seafood eaten around the world is mislabelled. And the amount of fraud being committed is increasing.
TIL that a study conducted in 195 countries, over a 26-year period, concluded that there is no safe level of alcohol consumption. The researchers admitted that moderate drinking may protect against heart disease, but found that the risk of cancer and other diseases outweighs these protections
TIL that when Winston Churchill's grandson, also a politician named Winston Churchill, visited Gulf War sites and introduced himself to a soldier, the soldier replied "Yes, and I'm Rommel."