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Even conservative calculations show the world is in the midst of a sixth mass extinction that’s being caused by our species — and is likely to lead to humanity’s demise if unchecked, scientists reported Friday.
The scientists’ analysis, published in the open-access journal Science Advances, follows up on more than a decade’s worth of warnings about a rapid loss of global biodiversity. Many experts say the loss has risen to the scale seen during five previous global extinction events — the most recent of which occurred 65 million years ago when the dinosaurs died off.
The claims provide the theme of Elizabeth Kolbert’s Pulitzer Prize-winning book, “The Sixth Extinction.” But such claims have drawn skeptical responses as well. The skeptics say it’s difficult to judge the “background rate” of extinctions, as well as the current rate of species extinction.
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An Imbabura tree frog (Hypsiboas picturatus) perches on a finger at the Jambatu Center for Research and Conservation of Amphibians in Quito, Ecuador. Amphibian species have been particularly hard-hit by environmental threats. Guillermo Granja / Reuters
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