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Internet users are quick to point out that several of Melania and Donald's interactions during inauguration weekend suggest tension in the relationship, from her body language during their first dance to the way her smile immediately turns into a frown the second he turns away. There will be plenty more public appearances to dissect as long as Donald and Melania are in the White House.
So suggests new research that tracked changes in two genes thought to help regulate brain growth, changes that appeared well after the rise of modern humans 200,000 years ago.
For ASPM, the variation arose about 5,800 years ago, roughly correlating with the development of written language, spread of agriculture and development of cities, he said.
"The genetic evolution of humans in the very recent past might in some ways be linked to the cultural evolution," he said.
Francis Collins, director of the National Human Genome Research Institute.
Aside from not knowing what the gene variants actually do, no one knows how precise the model Lahn used to date them is, Collins added.
Other scientists urge great caution in interpreting the research.
"A different way to look at is it's almost impossible for evolution not to happen." Still, the findings also are controversial, because it's far from clear what effect the genetic changes had or if they arose when Lahn's "molecular clock" suggests — at roughly the same time period as some cultural achievements, including written language and the development of cities.Donald makes a speaking appearance at his alma mater, the University of Pennsylvania, and shouts, "Where's my supermodel? Donald, who is exploring a presidential run on the Reform Party ticket, calls into the tape, many women step forward to accuse Donald of sexual assault.Melania tells Anderson Cooper on CNN that Donald's accusers are lying and it's a big conspiracy to destroy Donald's candidacy.Scientists attempt to date genetic changes by tracing back to such spread, using a statistical model that assumes genes have a certain mutation rate over time.For the microcephalin gene, the variation arose about 37,000 years ago, about the time period when art, music and tool-making were emerging, Lahn said.