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head grows

09.01.2007

English anthropologists from the University of Birmingham measured 30 skulls of men and women - victims of the London Plague of 1348 - 1349 and 50 skulls of victims of the shipwreck of the English warship "Mary Rose", which sank in 1545 off Plymouth.

The old skulls were compared with modern x-rays of 31 adults of both sexes. It turned out that the height of the cranial vault of a modern person exceeds both old groups by about 15 percent. The facial part has become less dominant over the frontal, and the part of the skull that protects the frontal lobes, the main part of the brain associated with the mind, has increased.

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However, researchers at the Karlsruhe Institute of Technology, Germany, have succeeded in creating a frequency tunable WGM resonator, which is the basis of a tunable nanolaser, a laser capable of emitting light at different wavelengths. The resonator is adjusted by changing the size and shape of the flexible base on which it is installed. Stretching this base increases the distance between the two halves of the resonator disk, which leads to an increase in the wavelength of the light emitted by the laser.

The disk of the WGM resonator has a diameter of 25 microns, and its halves are separated by a gap of 2.5 microns. The disc halves are held in place by two "legs" that are part of a plastic base made from elastomer, a material that can be compressed or stretched. With the minimum width of the gap separating the halves of the resonator disk, the laser emission spectrum is mixed into the blue light region, and the laser light wavelength adjustment range is several micrometers, which covers the entire visible range.

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