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Unraveling the causes of the pandemic, and preparing for the next

David Quammen was one of the first science writers to report on the spillover of viruses from wildlife to humans. In an interview with Yale Environment 360, he talks about what scientists now know – and don’t know – about what caused the Covid-19 pandemic and why it matters.

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Unraveling the causes of the pandemic, and preparing for the next

Peter Dykstra: Journalists I’m thankful for

My third annual list of the over-achieving and under-thanked.

WATCH: The latest evidence of widespread sperm count decline

"Pregnant women, and men planning to conceive a pregnancy, have a responsibility to protect the reproductive health of the offspring they are creating."

Car tire chemicals are killing salmon and steelhead

The chemical 6PPD, added to tires to prevent degradation, is causing a “complete breakdown of the blood brain barrier” in fish, a new study found.

A new analysis shows a “crisis” of male reproductive health

Global average sperm count is declining at a quicker pace than previously known, chemical exposure is a suspected culprit.

Investigation: PFAS on our shelves and in our bodies

Testing finds concerning chemicals in everything from sports bras to ketchup, including in brands labeled PFAS-free.

Frequently asked questions on the new sperm count decline study

Sperm counts are declining everywhere — the implications are huge.