Who can kill the largest leeches on the planet? Detailed answer

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Who can kill the largest leeches on the planet? Detailed answer

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Who can kill the largest leeches on the planet?

The largest leeches of the species Haementeria ghilianii, living in South America, reach up to 45 cm in length, and their trunk is 15 cm. These leeches can attack caimans, anacondas and other large animals, including humans. A case is known when several large individuals killed a cow.

Authors: Jimmy Wales, Larry Sanger

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Which silent film did the Czech audience voice themselves while watching?

One of the first films director Milos Forman saw was a silent documentary based on Smetana's opera The Bartered Bride. According to Forman, the popularity of the opera in the Czech Republic was so high that the audience themselves sang all the parts while watching the film.

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Brain implants to restore vision 05.12.2020

Researchers at the Netherlands Institute for Neuroscience are one step closer to restoring vision to blind people. The new invention has been successfully tested on macaques.

Implants with 1024 electrodes were implanted into the cerebral cortex of macaques. The electrodes conduct electrical signals to the brain, stimulating the part of the cortex responsible for vision. As a result, the signals are converted into an image.

As lead researcher Peter Roelfsema explained, stimulating the cortex with a single electrode can produce an image of a single point. But when a set of electrodes is used, an image can be created.

During the tests, the monkeys completed a number of tasks. With the help of implanted implants, they had to recognize various objects, including lines, moving dots, letters. And they did it.

Neuroscientists believe that the new technology will someday help restore vision to people.

According to Peter Roelfsema, in the future, a person will be able to see with the help of a camera built into glasses. Images from the camera will be converted into electrical current and sent to the implants. And those, in turn, activate the corresponding cells, and a person will be able to examine objects.

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