Humans' Role in Extinction

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1. Humans have existed for 200,000 years on Earth.
2. Early man helped hunt the biggest animals – woolly mammoths, giant kangaroos and giant sloths – to extinction.
3. The passenger pigeon, the Tasmanian tiger and, most recently, the baiji, a freshwater dolphin in China are all gone forever.
4. According to the study in Science, their numbers fell by half over the past 35 years.
5. That makes this the fastest extinction event on record, even if it is not yet a mass die-off.
6. The biggest animals still left on the planet – elephants, tigers, whales, among others – are most at risk.
7. And we humans have shown no desire to stop the activities that drive extinction.