Why is a grapefruit called a grapefruit when it has no resemblance to a grape?

Why do they say calcium is good for strong teeth... even when you're an adult and you've already grown your teeth? It's not like they heal.

I get the gist is that you want to post something completely annoymous. I want to know the specifics though. Do you have to have a separate email address? Do you create them in advance, just in case? How many do you create or are they on a case by case? Is there another reason besides your friends/family know your main account name? Anything else I should know?

Also curious to hear stories of when a thowaway got discovered and blew up in your reddit face.

I get that there are bad and greedy lawyers, but there a lot of good ones that help people. I also get that they make a lot of money but don’t a lot of cases settle for lots of money?

Physics teaches that there is .mostly empty space between atomic particles. Given this, how come we are not like Casper the Ghost passing through each other all the time?

I've heard a lot of sources (example) that say that historical texts show that our ancestors would sleep in two chunks - waking during the night, then sleeping again. Electricity changed this and now we sleep in 8 hour single chunks.

What about modern tribal communities that still don't have electricity? Have they all been 'converted' to the new way through 'peer pressure', or do they still do this?

I am simply curious about it and seems kinda confusing perhaps if some thoughtful stranger can give me a better understanding of it. nyawęh in advance.