Island Castaways

摘要

The fourth largest island on earth, Mada- gascar is separated from Africa by the Mozambique Channel, 240 miles across at its narrowest point and more than a mile deep in most places. Some 160 million years ago, Antarctica, South America, Africa, India, Australia, and Madagascar were joined together, forming the great southern supercontinent of Gondwana. Over millions of years, this supercontinent fragmented into the continental blocks we recognize today.