4 ms·
The groups studied all live and are genetically from within 20 degrees latitude (S). USA is from 30--50 deg N, and genetically probably higher. I would be willi
by nfirvine 11y ago
The groups studied all live and are genetically from within 20 degrees latitude (S). USA is from 30--50 deg N, and genetically probably higher. I would be willing to bet that higher temperatures and longer days tend to make your sleep shorter.