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Soap dispenser telling jokes

09.08.2021

Amazon continues to try to make smart homes even smarter - even where it's not exactly required. A smart soap dispenser from all previously known is presented.

The Amazon device is equipped with an LED screen that counts down 20 seconds. This is how much the WHO recommends washing your hands, which is especially important during the coronavirus pandemic. Okay, now this is even useful! Move on.

Thanks to the built-in Wi-Fi module (yes...), the dispenser connects to Amazon smart speakers. And here begins what it was all about: the dispenser automatically plays songs and tells jokes while you wash your hands. Otherwise, it will be too boring, according to the company. By the way, for all this to work, the dispenser needs to be charged - at least once every three months.

The price of new items is $55.

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Random news from the Archive

DNA from the air 12.09.2021

Forensic scientists actively use DNA analysis: if traces of someone's DNA remain on some surface, it means that a person touched this surface - for example, he could lean on a table, or run his hand along the wall. Or he could not lean and not hold: Flinders University employees found out that it is not necessary to touch with your hand to leave a DNA trace - your DNA can fly to an object through the air.

For the experiment, special plates for collecting DNA were placed around several work tables. The dice stood at a distance of half a meter to five meters, and they stood like that from one day to one and a half months. Nobody was supposed to touch them. And it turned out that despite the fact that no one touched the dies, the DNA of the person who worked next to them settled on them.

It is easy to guess that the amount of DNA was the greater, the longer it was collected. With the distance, everything was not so obvious: most of the DNA was on those plates that stood at a distance of two meters. If there were more than four meters between the die and the desktop, then there was almost no DNA in it. It is clear that DNA will not reach a long distance. But the fact that it was less at half a meter than at two meters can perhaps be explained by the fact that a short distance of DNA simply flies: air movements produced by a person drive it away further.

DNA is a fairly stable molecule. A dead cell, when destroyed, leaves DNA in its place, which will also be partially destroyed, but still not completely - as we know, DNA that has remained in the soil since the time of the Neanderthals is now being successfully read. We are constantly shedding a certain amount of DNA from dead skin cells, exhaling it along with water vapor from the lungs, etc., so it is not surprising that even without touching we are able to leave some kind of DNA trace. And criminologists probably need to take this into account: on the one hand, such DNA can help understand the testimony and facilitate the search for a criminal.

On the other hand, it can also become garbage, which does not allow you to see the true picture of what happened. And this is not the first study that questions the validity of DNA as a witness: we already wrote once that due to the strength and stability of DNA, traces of the DNA of a person who never touched it can remain on a crime weapon.

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