An emu-led recovery

EMUS HAVE RANGED ACROSS AUSTRALIA for tens of thousands of years. When Tasmania was isolated by rising sea levels 14,000 years ago, emus there formed a separate population. But after the island was invaded and settled from 1803, colonists began to hunt emus by the thousand. In about 50 years the wild Tasmanian emus were gone. What was lost?

In some corners of the world, large animals are making a comeback. After centuries of hunting and habitat loss, wolves, bears, beavers and otters are being released into the wild. This