Russian diver snaps spellbinding macro photos of coral beneath the Red Sea

Paris-based artist replaces billboards with solid slabs of color

Stunning photos of Earth from space by the Canadian astronaut

German photographer Michael Poliza traveled by helicopter to capture the extraordinary landscapes of the Rift Valley in Kenya and Ethiopia from the air

French photographer superimposes rural night skies on the world's greatest metropoles

Thought-provoking aerial photos of suburban development in America

Mexican-American artist recycles trash into neatly arranged installations at Guggenheim Museum

Extraordinary photos of food shot with an electron microscope

Austrian artist asks, "What would happen if..."