- is the ratio between mass and volume of blood the same for all living things, or does it vary for each species?
- Why do we all have different finger prints? and do twins have the same finger print ?
- Why does hair, such as body hair, stop/slow growth when it reaches a certain length? (If related to answer) How can
- How could you store a substance in your blood that destroys everything it touches?
- why is scar tissue a different colour to normal skin?