The invention of farming brought humans and animals into much closer contact and humans likely evolved more robust immune systems to fend off infections that the animals passed on. But scientists may have overestimated the impact farming had in shaping the human immune system, because tests on the hunter-gatherer’s DNA found that he already carried mutations that boost the immune system to tackle various nasty bugs. Some live on in modern Europeans today. “Before we started this work, I had some ideas of what we were going to ﬁnd,” said Carles Lalueza-Fox, who led the study at the Institute of Evolutionary Biology in Barcelona. “Most of those ideas turned out to be completely wrong.”
What does Lalueza-Fox say about the study results?
She found them to be surprising They supported her previous ideas They show how humans developed better immune systems to deal with infections from farm animals They describe the appearance of the Mesolithic man with unprecedented accuracy