The massive, deadly eruption of the Icelandic volcano Eldgjá in 10th century brought climate change and Christianity to the island colony.
James Hinds was assassinated for his beliefs, and today is largely forgotten. He stood up for African-American civil rights during the Reconstruction, provoking the KKK's ire.
In a world full of wild insect defenses, bombardier beetles stand out for the violent chemical reaction they employ to deter enemies.
The U.S. is the only country in the world that sentences people to die in prison for offenses committed while under the age of 18.