The retention of lactase persistence into adulthood is an example of such recent evolution. Recent human evolution seems to have been largely confined to genetic resistance to infectious disease that have appeared in human populations by crossing the species barrier from domesticated animals.
Stands for White People Shit. Describes a wide variety of things ranging from mountain climbing to Michael Bolton to Dr. Phil to tiny watercress sandwiches. People of all races can enjoy WPS, but it's something that is intrinsically White People Shit.
USPS stands for United States Postal Service. (regular mail). UPS stands for United Parcel Service. This is a courier service and offers many different levels of service with a wide range of delivery times and prices.