Moon rock, on Earth: an astronaut's photo catches Madagascar's ancient lunar twin

From the International Space Station, an astronaut photographed a pale, circular patch in southern Madagascar that stands out from the dark rock around it. The formation is anorthosite, the same bright rock that makes up the Moon's shining highlands, formed at least 600 million years ago and now exposed across about 100 square kilometres (about 40 square miles). A piece of deep Earth history, visible from orbit.