Why were the babylonians obsessed with finding the secret to immortality/avoiding death?

What does the first stage of a multistage rocket do?

You want to test the hypothesis that smoking cigarettes increases the risk of lung cancer. in your experiment, you take 100 people of various ages and genders for each of your groups. one group smokes. the other group does not smoke. the group that does not smoke is called the group

Because of the risk of a can exploding, all aerosol cans should be punctured with a sharp object before disposing of them. true or false? the true