Welcome to Nerdville

Today I learned…

• The corpus callosum is the fissure that connects the left and right hemispheres of the mammalian (e.g. human) brain. Although many, many studies have been performed describing (as well as refuting) morphological differences in size between the corpus callosums (is that how you pluralize it?) of males and females, the jury is still out on whether sex plays any role, and whether there are any personality or psychological effects.
• Although dealerships and manufacturers mislead people with their descriptions of 4WD and AWD vehicles, there are pretty distinct differences between them. While 4WD vehicles can be much more effective in times of need, they really don’t work well on dry pavement, which is why you can turn the feature off. AWD vehicles, on the other hand, use (typically) three differentials so that you can drive them on dry pavement as well as in tough conditions, making them more versatile, though also more prone to malfunction, and you can’t turn them off at all.