Dating ancient remains called
In fact, the variations were so common they couldn't be accidental mutations but instead were probably due to natural selection, where genetic changes that are favorable to a species quickly gain a foothold and begin to spread, the researchers report.
Lahn offers an analogy: Medieval monks would copy manuscripts and each copy would inevitably contain errors — accidental mutations.
"We, including scientists, have considered ourselves as sort of the pinnacle of evolution," noted lead researcher Bruce Lahn, a University of Chicago geneticist whose studies appear in Friday's edition of the journal Science.
"There's a sense we as humans have kind of peaked," agreed Greg Wray, director of Duke University's Center for Evolutionary Genomics.
About 600 kilometers north of Lima, an imposing earthen mound looms over the sea.
People began building the ceremonial structure, called Huaca Prieta, about 7800 years ago.
As to what gave these ancient individuals such impressive stature, the researchers think the people of what's called Longshan culture – named after Mount Longshan in Zhangqiu – had good food to thank for their healthy frames.
Initially, he was interested in examining the mound itself.The national average in 2015 was 1.72 metres (5 ft, 8 in).So it seems modern men of the same region are significantly shorter than many of these ancient forebears, even though men in China today would enjoy far better access to a range of healthy foods, and live in an era when we know much, much more about nutrition.The assignment wasn’t as easy as he’d anticipated, the telegenic chef confesses before whipping up a lovely brown miche that appears far more mouth watering than the carbonized round found in the Herculaneum oven.His recipe could be mistaken for modern sourdough, but he also has a go at several details that speak to bread’s role in ancient Roman life: Its perimeter has a cord baked in to provide for easy transport home. Those who didn’t buy direct from a bakery took their dough to community ovens, where it was baked for them overnight. This is true of the 80 loaves found in the ovens of the unfortunate baker, Modestus.