Using radar a scientist sends radio waves to the base of the ice and measures the return time to measure the thickness. Makers Dappled sunlight filters through the

Dappled sunlight filters through the rainforest canopy backlighting a carpet of green leaves

A fisherman's boat rests by the pebbled shore of Lake Tanganyika

The vast Altiplano rises to the Andes mountain range in southern Chile Torres del Paine National Park

A rugged and weathered sandstone escarpment rises over a forest canopy

Using radar a scientist sends radio waves to the base of the ice and measures the return time to measure the thickness. Makers Dappled sunlight filters through theUsing radar a scientist sends radio waves to the base of the ice and measures the return time to measure the thickness. Windless Bight, Ross Ice Shelf, Ross Island, Antarctica.