CT scans and genetic analysis of King Tut’s family reveal some surprising connections
By Lana BirbrairPosted 04.12.2010 at 10:23 am 0 Comments
Scientists once suspected that this 3,300-year-old corpse was King Tutankhamun's mother. They were close. The mummy is now believed to have been his grandmother—his only grandmother. Using CT-scan analysis and the first DNA tests able to amplify the genetic material of the desiccated Egyptian mummies, an international group of scientists and consultants with the Family of Tutankhamun Project found that King Tut's parents were full brother and sister, born of this woman.
Eleven-year-old Salu Raikwar, born with six fingers on both hands, walks near the Union Carbide pesticide plant in Bhopal, India. In December 1984 an estimated 27 tons of toxic methyl isocyanate (MIC) gas leaked from the plant and into the environment. The disaster resulted in the death of more than 6,000 people.
Now, with the passing of the 25th anniversary of the disaster, anecdotal evidence and reports not publicly available suggest a long-lasting legacy in the form of higher rates of cancer, delayed growth, and birth defects like webbed or extra fingers and cleft palates in children of parents exposed to the chemical, but no comprehensive studies have been made.
The sun-parched Tanezrouft Basin in Algeria is known as the "Land of Terror." This photo shows some 1,500 square miles of the area.
Photograph Courtesy ESA
In the Tanezrouft Basin of south-central Algeria, vegetation is sparse and sand is plentiful. Images like this one, taken by Japan's Advanced Land Observing Satellite, provide researchers with an easy look at hard-to-reach areas to survey natural resources, monitor disasters, and track vegetation coverage.
A worker stands inside one of the Metro tunnels under construction in New Delhi, India, in preparation for the Commonwealth Games this October. To overcome the challenges of a tight three-and-a-half-year schedule and construction underneath a densely populated city, engineers used 14 tunnel-boring machines (TBMs) to dig the underground thoroughfare.
In this depiction of the rod-shaped E. coli, two flagella trail from one end while hairlike pili surround a capsule full of tangled nucleoids.
This 41-inch-long sculpture of the Escherichia coli bacterium is part of British artist Luke Jerram’s “Glass Microbiology” series of portraits. Other organisms he has vitrified include HIV, SARS and swine flu.
In this micrograph of dorsal closure in a fruit-fly embryo, the protein actin is marked red, prominent around the gap in the epithelial cells. The microtubules that give shape to cells are green, and epithelial cells with their microtubules destroyed are blue.
One of the steps in fruit-fly development is similar to the healing of wounds. Until recently, scientists believed that when fruit-fly bodies take form during a process called dorsal closure, long strings of the protein actin behaved like the drawstring of a purse, pulling together the epithelial cells that eventually form the fly's skin.
An array of microelectrodes connects with the brain, potentially allowing paralyzed patients to control computer interfaces with their minds.
Courtesy Kelly Johnson/University of Utah Department of Neurosurgery
Each issue of Popular Science opens with Megapixels--two of the most amazing images from the world of science and technology that month. Here, we've compiled them all from 2009 for your viewing pleasure, with some additional images from years past and present added to the mix.
Tiny surface electrodes could help paralyzed people move
By Carina StorrsPosted 11.04.2009 at 10:17 am 3 Comments
Bundles of microelectrode wires fan out over a small area of a human brain. These electrodes were placed by neurosurgeons at the University of Utah to see if they could detect precise brain activity associated with motor movements. To their surprise, the hair's-width microelectrodes, originally designed to study epilepsy, picked up the firings of small groups of neurons despite being merely set on the surface of the brain.