Bucket node. Travel Tips

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Bucket node. Travel Tips

Tourist tips

Imagine that a climber needs to descend a rope from a height down. He walks alone, and he has only one rope, which he still needs. What to do in order to take the rope with you when descending from a height? Very simple: you need to fasten the rope with a bucket knot, go down along its root end and, with a jerk for the long running end, untie the knot tied at the top.

With this "remotely decoupled" bucket knot you can lower from the window of the house, for example, a bucket of water, put it on the ground and raise the rope up again.

Rice. 103. Bucket knot

Author: Skryagin L.N.

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It is known that many animals, such as birds, bees, lobsters, newts and others, can sense the relatively weak magnetic field of the Earth and navigate in space with its help. Such abilities are “hardwired” into the genetic code of these animals, and recently researchers from Baltimore managed to find the corresponding sequence in the genome of one fish, the glass catfish (glass catfish, Kryptopterus bicirrhis), isolate it and introduce this sequence into the genome of nerve cells in the brain of an experimental rodent. After such a genetic modification, the rodent's brain became sensitive to electromagnetic waves, and a similar technology can be used in the future for non-destructive monitoring of the activity of nerve cells and heart tissue cells, for example.

Scientists have previously been able to identify the genes responsible for "magnetic perception" in pigeons and some types of bacteria. Most of these genes are part of very complex biological mechanisms, and the gene removed from the glass catfish is unique in that it works completely on its own and is not associated with any other complex biochemical complexes.

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