Chatterbox: Down to Earth

Hey guys,

Can you help me with a report I'm doing for school?

First, name three historical figures.

Next, name three scientists/mathemeticians. They can be from modern times or from the past.

Don't bother looking things up or being creative or unique, please write what pops into your head. If you're blanking, you don't have to do so many. 

Thanks a bunch! Maybe when I finish the report I'll post it here.