One of the many questions I have about biology is 'why do humans age'? Since most cells in our body replace themselves often with exact duplicates, why can't we keep getting new, better cells? What makes the cells replicate differently? In the past, I heard that we have caps on our chromosomes that get cut in half every time a cell divides, but if the things that makes humans age aren't related to chromosomes, how does that make cells die? This question interests me because aging and dying is a part of life and I want to know why it happens.
Another question I have about science is 'does the five second rule exist'? It makes sense that less germs would be on a piece of food that fell on the ground, but is it safe to eat? Does the amount of germs on that food item grow substantially bigger after five seconds? This question intrigues me because I have accidentally dropped so much food on the ground in my life, and I want to know how much time I have before it is unsafe to eat.
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