While hippos spend up to 16 hours a day submerged in water, they also take to the land (and have been known to be super aggressive). And for their size, they’re super speedy. Don’t try to outrun a hippo, because you’ll lose. They grow between 2,000 and 4,000 pounds, and can run between 15 and 30 miles per hour.

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