Van Gogh only sold one painting in his lifetime.

The NBA three-point line was adopted from the ABA (American Basketball Association) in 1979.

Cultural traditions are often passed down through generations.

The musical scale we use today was standardized at A = 440 Hz only in 1939 — different standards were common before then.

Project Blue Book officially ended in 1969.

Reading a physical book before bed improves sleep quality more than reading on a screen.

Abraham Lincoln was a licensed bartender and co-owned a tavern before entering politics.

The development of artificial joints improved mobility.

In 1518, a dancing plague reportedly caused people in Strasbourg to dance uncontrollably for days.