: In a 22-year window (1843–1865), it was theoretically possible for a Japanese samurai to send a fax to Abraham Lincoln .
: While the Great Pyramids were being built in Egypt, woolly mammoths were still roaming the earth on Wrangel Island; they didn't go extinct until about 4,000 years ago.
: The Turritopsis dohrnii is a species of jellyfish that can theoretically live forever by reverting to its juvenile polyp stage after reaching maturity.
: France was still using the guillotine for executions as late as 1977—the same year the original Star Wars was released in theaters. Bizarre Science & Nature Facts