primates

(Newser) - A diminutive fossil recently found in Mississippi is the oldest primate discovered in North America, and its exact age is raising questions about the timing of prehistoric animal migrations, reports the Pittsburgh Post-Gazette. The existence of the tiny, tarsier-like creature, which could fit in the palm of a human hand,...

(Newser) - Humans aren't the only animals who laugh, according to a new study. Orangutans engage in a primitive form of laughing, the BBC reports—when one exhibits a facial expression such as an open, gaping mouth, and a companion displays the same expression less than half a second later. This sense...