Half a century ago, family farms were prevalent. Animals grazed on pasture, breathing fresh air and feeling sunshine on their backs. During inclement weather, they were sheltered in straw-bedded barns ...

San Francisco Zoological Gardens, U.S.A. In In the wild, foraging for food occupies much of a primate's day. Considerable energy is expended as the animal travels its range in its search for food.

Marmosets and tamarins are small (250-500 g) South American monkeys of the family Callitrichidae. They are forest living species with squirrel-like locomotion and, unlike typical monkeys, most of the ...