Some researchers think birds might be able to "see" the magnetic field via photosensitive proteins in their retinas. The theory is that when a photon strikes one of these proteins, it creates a pair of oppositely charged ions, which separate for a fleeting moment before recombining. Each of these ions contains electrons with a quantum property called spin. Initially, these spins point in opposite directions - but in a magnetic field, they tend to become aligned. When the ions recombine, this alignment triggers a specific biochemical reaction, which gives the bird information about the magnetic field.
The idea has a major flaw though. The ions seem to be pulled back together about 10 times faster than researchers think Earth's magnetic field could affect the electrons' spins.
Now Iannis Kominis of the University of Crete in Heraklion, Greece, suggests that a known quantum effect might be able to ramp up the impact of the magnetic field in enough time. "Quantum physics comes to the rescue," he says.
Even better, Jannini now has evidence that women who have this thicker tissue can be "taught" to have vaginal orgasms. Ultrasound scans on 30 women uncovered G spots in just eight of them and when these women were asked if they had vaginal orgasms during sex, only five of them said yes. However, when the remaining three were shown their G spots on the scan and given advice on how to stimulate it, two of them subsequently "discovered" the joy of vaginal orgasms. "This demonstrated, although in a small sample, the use of [vaginal ultrasound] in teaching the vaginal orgasm," Jannini says.
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