When Julius Caesar committed an act of war by crossing the Rubicon River and moving into Roman territory in 49 B.C.E., he gave birth to a classic phrase meaning that one has passed the point of no return.Wikimedia CommonsHistory of Julius Caesar by Jacob Abbott c. 1849. On January 10, 49 B.C.E., Julius Caesar and his army crossed the Rubicon, a stream separating Gaul from the Roman Republic. This action would prompt a civil war in Rome that led to Caesar gaining power over the region and establishing the Roman Empire.

Also known as the pirarucu or paiche fish, the arapaima is a massive air-breathing fish native to the Amazon Basin in South America.If you’ve played Nintendo’s Animal Crossing: New Horizons video game, you’ll have likely met an impressively large fish with red-and-black coloring called the arapaima. While animals featured in the game are based on real living creatures, the massive size of the arapaima makes it almost unreal. The arapaima, or pirarucu fish, is a giant fish that has existed for 23 million years.

Built in the 13th century by Clan Maxwell, Caerlaverock Castle is a striking triangular fortress on Scotland’s southern coast — which can still be visited today. Flickr/FloydThe castle sits on the Caerlaverock National Nature Reserve which spans 21 square miles. While there are more than 2,000 castles scattered throughout Scotland, not many have seen as much historic conflict as Caerlaverock Castle. Situated on the southern coast about seven miles from Dumfries, the 13th-century monument withstood the Wars of Scottish Independence and its numerous sieges by the English.

Authorities believe that Naya Rivera used the last of her energy to push her four-year-old son Josey to safety on their boat before disappearing beneath the surface of California's Lake Piru on July 8, 2020.Naya Rivera/InstagramNaya Rivera was just 33 years old when she drowned in California’s Lake Piru. Naya Rivera’s death on July 8, 2020, shocked her friends, family, co-stars, and fans alike. The beloved actress drowned in Lake Piru near Santa Clarita, California, while swimming with her four-year-old son.

In her lifetime, Annie Jump Cannon identified half a million stars. How many can you identify?Source: Wikipedia In her lifetime, Annie Jump Cannon identified more than 500,000 stars. This is without a doubt a remarkable feat for anyone, least of all a young deaf woman who spent her 19th century childhood with her head not just in the clouds—but in galaxies. Annie’s mother fostered her interest in astronomy when she was a child, teaching her to identify the constellations and making certain she had plenty of books to read on the subject.