The Insides of These Everyday Objects Are Totally Unexpected

Submarine

This is an inside look into an actual submarine, where people roam around safely under the sea. How anyone could live a life in a metal tube under the sea baffles the mind, but these professionals do it! The person walking below the machine provides some insight into how big this thing actually is...

The More You Know

Only two national flags have the color purple on them.
In 2009, Burger King launched a campaign that if you unfriended 10 friends on Facebook, you were entitled to a free Whopper. The person you unfriended would get a message telling them that their friendship is worth less than a Whopper.
Hippos produce their own sunblock.
Lightning can heat the air it passes through to 50,000 degrees.

Post originally appeared on Upbeat News.