Tammy2144 oxygen actually used to be toxic to living things on earth for 100s of million years. Eventually, we life on earth has been able to cope and now depends on oxygen. However, there is no certainty that oxygen will be required to live if we evolve. In fact there are many organisms on earth that can live without oxygen for indefinite periods
3pi14159 have you traveled around the world on one single trip? I'm guessing not. Therefore, you have no evidence to prove the world is round. All you have is other people's evidence. No matter how convincing and strong evidence is for the world to be round, you cannot be 100% sure.
gethann smh... her husband killed her! Now he is disguising himself as Carole Baskin and is going to create a tiger rescue enterprise. Don't believe everything you see!