What is your question you STILL don't know the answer to?

[e-]

Why do you need sunscreen? Humans have evolved in the sun since the beginning of life and now you need this super recent invention to avoid getting skin cancer??

[shevek]

Why do you need sunscreen? Humans have evolved in the sun since the beginning of life and now you need this super recent invention to avoid getting skin cancer??

Well, humans used to have more melanated skin until we spread out across the globe and most of us became less melanated and more sun sensitive, but that hasn't stopped us from wanting to travel places where there's more aggressive sun than our skin is prepared to handle. Also, yes, while we evolved in the sun, back then people just died from skin cancer, and now we can prevent it more as opposed to only treating it if it pops up.
There's also a variety of medications that sadly affect your sun sensitivity and skin cancer risk nowadays that people historically didn't have access to. I am actually scheduled to start one like that next week

[BUTCHBONEZ]

My dad brought home his high school yearbooks went he went to go clear out his moms house. I was looking through them and I got to a page that started with 'captains log 00163' [yes , he was a star trek fan] and I being the nosey person I am started to read it. I'm not going to quote it for privacy reasons but it was odd to say the least. When I was about 5 sentences in he noticed I was reading it ,  snatched it up and god knows what he did with it. I still wonder about what the rest of it was. It could've just been he was embarrassed [which it probably was] but I still wonder.

[Snackish Magpie]

Wowee, I've really enjoyed reading all these questions and answers mingling around! 

And also perhaps somewhat related to the "how did we find and harness electricity" question, I often wonder how we managed to program computers! Maybe the answer will be right there if I look it up, and perhaps it's *so* obvious, but I find it fascinating and bizarre that we programmed computers by feeding them punch sheets and the like early on... especially the notion of "we give computers a language they can understand", how do we do that?! Is it like with humans where we do an action and assign a "word" to it?     "hello, when this sheet has a hole in this place, I want you to register it as "xyz"", but how do we tell it that! Bonkers conkers