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The man who invented the Rubik's Cube couldn't solve it at first.
When professor Ernő Rubik invented the Rubik's Cube in 1974 to teach his students about 3-D geometry, even he couldn't solve the puzzle he had created. He famously wrote that it was like "staring at a piece of writing written in a secret code. But for me, it was a code I myself had invented! Yet, I could not read it. This was such an extraordinary situation that I simply could not accept it." Despite his initial inability to take down his own toy, he eventually learned to master the cube and could solve the puzzle in under a minute.
The Mayan and the Aztec People used cocoa beans as a form of currency.
Today, we can pay with cash, credit, or debit, but back in the times of the ancient Mayan and Aztec people, cocoa beans were currency. The precious seeds were also a valued commodity that could be traded for other goods. According to the Museum of the National Bank of Belgium, about 10 beans could buy you a rabbit.
Fish skin can be used to heal burns.
In Brazil, doctors lacking the supplies medical professionals in the United States might use are instead utilizing tilapia skin to bandage and treat second- and third-degree burns. The fish skin reportedly cuts down on healing time, reduces the need for pain medication, and helps with scarring, due to the abundant amount of collagen proteins. In 2018, scientists from Nanyang Technological University in Singapore also discovered that, in general, fish scale-derived collagen can help heal wounds.
There's a bird that has "evolved" back into existence twice.
The Aldabra white-throated rail may not be a very well known bird, but it's certainly a remarkable one. The flightless creature first found itself in trouble around 136,000 years ago when it went extinct—something it's done twice. However, a 2019 study published in the Zoological Journal of the Linnean Society explained that "the rail is an example of a rarely observed phenomenon called iterative evolution, in which the same ancestral lineage produces parallel offshoot species at different points in time." Because of this, it's been able to rally and "evolve" back into existence both times it was essentially wiped out.