LAKE EYASI, TANZANIA: Hadzabe man with bow and arrow. The Hadzabe, who live about 15-hundred miles north of the San near Tanzania's Serengeti, are the first branch in the human family tree. They split from the founding population (the San) around 150,000 years ago. Today the Hadzabe are one of the last groups of hunter-gatherers on Earth. This image is from The Human Family Tree.
GALAPAGOS ISLAND, ECUADOR: A giant Galapagos tortoise travels on the beach in Galapagos Islands, Ecuador. On Darwin's voyage, land animals such as reptiles were scarce on the islands. This image is from Darwin's Lost Voyage.
BARRANQUILLA, COLOMBIA, SOUTH AMERICA: Man painted in gold at the Barranquilla Carnaval, a carnival with traditions that date back to the 19th century. It takes place for four days preceding Ash Wednesday. This image is from Lonely Planet: Roads Less Travelled.