X @Nick Szabo

RT Marco Aurelio (@marcodecunha1)It’s also possible that the Holocene climate—with its relative stability and abrupt fluctuations—acted as a catalyst.By enabling the spread of agriculture, it created the radically new environment (diet, density, pathogens) that accelerated Darwinian selection on pre-existing alleles, as shown by Reich et al. and updating The 10,000-Year Explosion.Those same stresses may have activated retrotransposons via reverse transcription, increasing regulatory variation exactly when i ...