How Wolves Change Rivers

How Wolves Change Rivers

Wolves were once native to the US’ Yellowstone National Park — until hunting wiped them out. But when in 1995 the wolves returned, something interesting happened: the most remarkable “trophic cascade” occurred. The presence of wolves substantially...
The Dawn of De-extinction

The Dawn of De-extinction

Throughout humankind’s history, we’ve driven species after species extinct: the passenger pigeon, the Eastern cougar, the dodo … But now, says Stewart Brand, we have the technology (and the biology) to bring back species that humanity wiped out. So —...