When it’s all said and done, human decomposition begins around 4 minutes after death. This process is known as self-digestion, in which your enzymes and bacteria eat you away. In fact, three to five pounds of your body is made up of bacteria. In a an unclean mouth alone, 100 million to 1 billion bacteria can grow on each tooth – with 32 teeth each, some of us have more bacteria in our mouth than there are people in the world. If that leaves you weak in the knees, don’t worry – your bones are incredibly strong! When testing compression strength for a rate of 1 sec, an 83kg person with US shoe size 11 could have 16,000 people stand on their bone at once – that is of course, if there was room!