How do eels get their shocking abilities?
Why is it that humans have three different blood groups: A, B and O. Do animals have the same blood groupings?
How do smells travel underwater and how can a shark smell a drop of blood in an entire ocean?
I’d like to know if there are any life forms: plant, animal, fungus, whatever that are effectively immortal?
How is it possible for a Bornean flat-headed frog to have no lungs and breathe through its skin?
How do fish survive in both salt water and fresh water?
How long was a big dinosaur's lifespan?