Question

why Dead body floats on water not Living one?

Answer 1

Answer:

A person only starts to sink into the water when the air in his lungs is replaced with water. Once the body is submerged under the water, then the body stays under the water until the bacteria in the gut and the cavity in the chest can produce enough gases such as methane, hydrogen sulfide, and carbon dioxide in order to float on the surface of the water like a balloon. The building up of these particular gases in a human body can take up to weeks sometimes, also depending on various other factors.