Much of the cooling during the ice ages was maintained by the presence of a large northern hemisphere ice cap reflecting away a lot of sunlight, but carbon dioxide levels were lower, too.
A Walnut looks like a little brain, a left and right hemisphere, upper cerebrums and lower cerebellums.
核桃就像一个微型的头脑,有左半脑、右半脑、上部大脑和下部小脑。
3
Paired-samples T-test on the study group showed that 36 pairs among 48had lower powers on the left hemisphere than that on the right hemisphere and 12with significance (P<0.05).