Which Olympic champion hid that she was a hermaphrodite? Detailed answer

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Which Olympic champion hid that she was a hermaphrodite? Detailed answer

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Which Olympic champion hid that she was a hermaphrodite?

Polish athlete Stanisława Walasiewicz won the 1932-meter race at the 100 Olympics, setting a world record. It was only after her death in 1980 that an autopsy revealed that she was a hermaphrodite. Stanislava had both male and female pairs of chromosomes, and also had underdeveloped genitals of both sexes.

Authors: Jimmy Wales, Larry Sanger

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Charging wearable devices from the user's breath 08.12.2020

An international team of researchers led by scientists from the University of Pennsylvania (USA) has developed an elastic system that collects energy from human breathing and movement to charge "smart" wearable devices - for example, fitness bracelets.

According to the authors of the work, current versions of batteries and supercapacitors that power wearable and stretchable devices for monitoring and diagnosing health conditions have many disadvantages, including low energy density and insufficient elasticity.

An alternative to batteries are micro-supercapacitors, energy storage devices that can supplement or replace lithium-ion batteries in wearable devices. Of the advantages: micro-supercapacitors are small in size, have a high power density. On the downside, they have a "multi-layered" folded geometry, so these power sources don't stretch well, making them difficult to connect to wearable electronics.

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"When we have this wireless charging module based on a triboelectric nanogenerator, we can collect energy from the user's movement - for example, bending the elbow, breathing or speaking," the authors note.

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