Ants - The true lords of the underground!
If our species is ever forced to abandon the surface and live in an underground colony, we might want to employ a few Ants as chief architects. As the following video shows they are capable of building huge and complex underground tunnels and chambers. No wonder the poor fellows only get 4 hours sleep per day! They have to spend the other 20 hours carrying dirt out and supplies or building material back in. Just goes to show though: that ants nest in your garden, it is just the tip of an iceberg!