Emperor penguins live in the Arctic, arguably one of the cruelest environments, where it can get below -40 degrees Fahrenheit on the regular. They inhabit the ice and ocean that surrounds them, and have become experts at surviving. They dive up to 1,755 feet for food in water that’s well below freezing.

As the value goes up, heads start to swivel, and sceptics soften. Starting a new currency is easy. Anyone can do it. The trick is getting people to accept it.

Kilankwa, Federal Capital Territory, Nigeria