Judging only by skin color, most Korean hands would be indistinguishable from most Caucasian hands, and most Arabic hands would be indistinguishable from most Latino hands.
Likewise, judging only by brain function, no EEG-visible or MRI-visible differences appear between ethnic groups.
Brain volume is often calculated from MRIs, and varies between racial groups. (MRIs also give you brain volume of different regions of the brain, which also vary between racial groups.)
The most recent post in December's Stupid Questions article is from the 11th.
I suppose as the article's been pushed further down the list of new articles, it's had less exposure, so here's another one for the rest of December.
Plus I have a few questions, so I'll get it kicked off.
It was said in the last one, and it's good advice, I think:
This thread is for asking any questions that might seem obvious, tangential, silly or what-have-you. Don't be shy, everyone has holes in their knowledge, though the fewer and the smaller we can make them, the better.
Please be respectful of other people's admitting ignorance and don't mock them for it, as they're doing a noble thing.