21 Science Facts You Won't Believe Are True

6. When You Drink Alcohol, Your Gut Leaks Into Your Blood

Part of the reason you want to crawl up your own butt and disappear forever the morning after a big night, is down to all the poop floating around in your blood. Or, more specifically, the bacteria from your poop called endotoxins.

When your body metabolises alcohol, it produces a toxin called acetaldehyde which damages the lining of the gut, allowing bacteria to pass through the protective barrier. This means that your body reacts as though it is suffering from bacterial infection and swells up, causing you to feel like you've done a few rounds with Mike Tyson and causing damage that can last up to two months.

5. Pompeii's Residents Had Upstairs Toilets

We'll keep with the toilet humour for a second.

Considering a lot of people in 1950s Britain hadn't figured out the joys of indoor plumbing yet, the residents of 1st Century Pompeii were living the dream, and archaeological evidence - mostly consisting of ancient poo scrapings - suggest that they not only had civilised indoor bathrooms, but they were also upstairs.

Despite the fact that the eruption of Mount Vesuvius destroyed most of the upper city's storeys (rude) we have so far, 23 second-storey lavs used by the technologically advanced, colonically cleansed, Pompeians.