A little more than a year ago, on a trip to Nairobi, Kenya, some colleagues and I met a 12-year-old Masai boy named Richard Turere, who told us a fascinating story. His family raises livestock on the ...

About 2,500 years ago Greece was one of the most important places in the ancient world. The Greeks were great thinkers, warriors, writers, actors, athletes, artists, architects and politicians. The ...

Every animal and plant needs food to live, and they are all part of a food chain. A food chain shows how animals obtain their food. A food chain also shows the flow of energy, which starts off at the ...