Australia's Great Barrier Reef is rapidly losing its coral, to the point that UNESCO may soon place the natural wonder on its "in danger" list. Climate change is one culprit, but so is the country's booming extraction industry. Environmentalists warn that time is running out for the reef.![]()
A marvel of nature, the lakes of Ounianga in the Sahara Desert have lasted thousands of years and withstood dramatic climate change. Now, a German geologist has analyzed lakebed sediments to shed light on a spectacular chapter in human history.![]()