Unlike Old World monkeys, howlers and other New World species have wide, side-opening nostrils and no pads on their rumps. Howlers also boast a prehensile tail. They can use this tail as an extra ...

Woolly monkeys were once considered four species: the gray, Columbian, silvery, and Peruvian yellow-tailed woolly monkeys. More recent genetic studies suggest there are only two species—the ...

For example, a rhesus monkey named ''Miss Sam'' was launched in 1960 in a Mercury capsule that attained a velocity of 1,800 mph (1,900 kph) and an altitude of 9 miles (14.5 kilometers) . She was ...