Extinction Kills Whole Taxonomic Families

Photo courtesy the US Department of Agriculture

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The BBC reports how whole “chunks of life” are lost in extinction events when related species vanish together. That’s based on a new paper in Science analyzing the extinction rates of fossil marine bivalves (clams, oysters, mussels) from the past 200 million years.

Turns out that extinctions tend to cluster along evolutionary lineages, wiping out species with a common ancestor and eliminating entire branches of the evolutionary tree. One researcher called it a casino of extinctions with the odds rigged against certain groups. The same is happening to modern species. For instance, the same drivers—climatic change and habitat loss—are now threatening whole groups of seabirds. This new understanding could enable more effective conservation efforts faster.

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DEMOCRACY DOES NOT EXIST...

without free and fair elections, a vigorous free press, and engaged citizens to reclaim power from those who abuse it.

In this election year unlike any other—against a backdrop of a pandemic, an economic crisis, racial reckoning, and so much daily crazy—Mother Jones' journalism is driven by one simple question: Will America will move closer to, or further from, justice and equity in the years to come?

If you're able to, please join us in this mission with a donation today. Our reporting right now is focused on voting rights and election security, corruption, disinformation, racial and gender equity, and the climate crisis. We can’t do it without the support of readers like you, and we need to give it everything we've got between now and November. Thank you.

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