Common Fungicide Causes Changes in Mating Behavior Generations After Exposure

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Female rats avoid males whose great-grandfathers were exposed to a common fruit crop fungicide. Researchers from the University of Texas at Austin examined rats whose great-grandparents were exposed to the fungicide vinclozolin, which causes early onset of cancer and kidney disease in males.

Female rats can tell the difference between male descendants of rats that have or have not been exposed to vinclozolin, and strongly prefer males descended from unexposed rats. Proving for the first time that environmental contamination affects evolution through changes in mating behavior.

Vinclozolin causes changes in the male rats’ germline cells, like sperm. It doesn’t directly alter DNA, instead causing changes in elements that regulate DNA. This is known as an epigenetic change.

Early onset of disease caused by initial exposure to vinclozolin is passed down generation to generation through the germline of the males. The female rats can sense something is wrong, even though they can’t see it. Since males move beyond their birth territory when they mature, they carry their unlovable and fatal defects with them.

Hmm. Is the biosphere cannily healing itself, one little rat at a time? Or are rats truly destined to inherit the Earth? Julia Whitty

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SIX TRUTHS

Reclaiming power from those who abuse it often starts with telling the truth. And in "This Is How Authoritarians Get Defeated," MoJo's Monika Bauerlein unpacks six truths to remember during the homestretch of an election where democracy, truth, and decency are on the line.

Truth #1: The chaos is the point.

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Please take a moment to see how all these truths add up, because what happens in the weeks and months ahead will reverberate for at least a generation and we better be prepared.

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