But how scared that young black man was that he didn’t dare move an inch until someone outright told him he was free to go. I’m glad the cameraman was there with the knowledge to help him and the camera to keep the cops in line.
Your body has about 40 trillion cells, and they all arose from a single fertilized egg. But it turns out the DNA in many of those cells is no longer a perfect clone of that original one.
A study published Thursday in the journal Science shows that our body’s cells are a mosaic, with many subtle genetic variations.
It’s not news that that our cells pick up mutations as we age. Some skin cells morph into moles. And scientists have previously documented widespread genetic changes in cells in the skin, esophagus and blood.
Tumors start out as mutant cells, as well.
“But no one has really characterized this across many different tissues and across a great amount of individuals,” says Keren Yizhak. She took that as a challenge as she started working as a postdoctoral researcher at the Broad Institute at MIT and Harvard.
Archaeologists have uncovered more than 100 ancient inscriptions carved into rock at Wadi el-Hudi, where the ancient Egyptians mined amethyst.
In addition to the carved-rock inscription, the researchers also found 14 stele (inscriptions carved on a stone slab or pillar) and 45 ostraca (inscriptions written on pieces of pottery).
Analysis of the newfound inscriptions is underway. So far, archaeologists can tell that many of the inscriptions date back around 3,900 years, to a time that modern day archaeologists call the “Middle Kingdom.” One of the inscriptions mentions Pontius Pilate, the Roman governor of Judea who presided over the trial of Jesus, according to the bible. Many of the ostraca date back around 2,000 years, to around the time that Rome took over Egypt. Read more.
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