Bill Laurance

Fences are stopping Earth's great animal migrations

For time immemorial, many wildlife species have survived by undertaking heroic long-distance migrations. But many of these great migrations are collapsing right before our eyes.

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If We Don't Halt Earth's Sixth Great Extinction Event, the Tree of Life Will Take Millions of Years to Recover

Life has existed on Earth for roughly 3.7 billion years. During that time we know of five mass extinction events—dramatic episodes when many, if not most life forms vanished in a geological heartbeat. The most recent of these was the global calamity that claimed the dinosaurs and myriad other species around 66 million years ago.

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