Pigs, which have the largest litter size of all even-toed ungulates, have two rows of teats lined from the armpit to the groin area. In most cases, however, even-toed ungulates have only one or two pairs of teats. In some species, these form an udder in the groin region.
What is a roundabout? A modern roundabout is a circular intersection where drivers travel counterclockwise around a center island. There are no traffic signals or stop signs in a modern roundabout. Drivers yield at entry to traffic in the roundabout, then enter the intersection and exit at their desired street. Studies by the Federal Highway Administration have found that roundabouts can increase traffic capacity by 30 percent to 50 percent compared to traditional intersections.
What is the difference between a traffic circle and a roundabout? Roundabouts are different from traffic circles in that traffic circles can involve stop signs, stop signals, or no control at all; traffic circles can be very large, operate at higher speeds and confusing to navigate, often requiring motorists to move from one lane to another.