A science presenter, writer, speaker & former TV host; author of The Skeptic's Handbook (over 200,000 copies distributed & available in 15 languages).


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Life copes: The horses that adapted to massive climate change in just 800 years

In evolutionary terms, it’s a blink. Around 1200-1400AD a bunch of people bought a few domestic horses to far east freezing Siberia, where the temperature sometimes falls below -70. Somehow the horses have already become physiologically and genetically well adapted to the extreme climate. The panic-merchants would have us believe that the climate is changing “faster than evolution”, but biology and genes turn out to be amazingly flexible. (Who knows, maybe 4 million years of swinging ice ages has that effect on gene pools?)

DNA studies revealed that these horses were all derived from distant domestic horses, even though wild unrelated horses lived in the region til 5,000 years ago. This is pretty spectacular.

Dr. Ludovic Orlando: “This is truly amazing as it implies that all traits now seen in Yakutian horses are the product of very fast adaptive processes, taking place in about 800 years. This represents about a hundred generations for horses. That shows how fast evolution can go when selective pressures for survival are as strong as in the extreme environment of Yakutia.”

Analyzing the genomes shows that it’s not driven by mutations in genes as much as by changes to the regulatory [...]