the human body is an engineering marvel. I sneeze in bright light. if I dont get enough sunlight on my skin I get tired and sad and have to drink a lot of milk to fix it. standing too much hurts, but sitting too much also hurts. if I get a virus, my body will increase its temperature in an attempt to cook it, which also cooks my brain cells. toenails exist. I have to turn the radio down to see better when I drive. there are 17 genes dictating what my hair texture is, but it completely changes when the air is too humid. yawning is contagious. there are more species of bacteria living in my body than there are species of birds in the entire world. every few months I grievously injure my neck by "sleeping on it weird." it took seven million years of human evolution to form me, and now I'm afraid of phone calls.
I mean in fairness the human body *isn't* an engineering marvel, the human body is a product of evolution, which is the ultimate expression of duct taping a glue gun to an industrial stapler and calling the resulting join 'eh good enough'. Evolution is the PINNACLE of 'if it ain't broke don't fix it' except it's metrics for 'ain't broke' are, frankly, useless at the individual scale and it's methods of fixing things are hurling metaphorical noodles at mostly metaphorical walls at the population scale for millions of years. You know that saying about a stupid idea that works isn't stupid? Yeah, that's evolution's whole Thing.
There are *elements* of biology, biochemistry, biomechanics, etc that are mind-blowingly cool and light years beyond anything we could possibly engineer on purpose, and then there's things like the fact one of our major nerves takes a detour round one of our major blood vessels because several million years ago we used to be fish. The next time someone tries to convince you of intelligent design tell them to go look up the laryngeal nerve - particularly in giraffes! - and then get back to you.
