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Which birds help people look for honey and why? Detailed answer

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Which birds help people look for honey and why?

Birds from the family of honeyguides love to feast on beeswax, but they are not able to penetrate the hive themselves. Instead, they look for humans or other mammals that eat honey, fly up to them and, in a peculiar behavior, ask to follow them, eventually leading to bees. After opening the hive, when a person takes the honey, these birds get access to the wax.

Authors: Jimmy Wales, Larry Sanger

 Random interesting fact from the Great Encyclopedia:

What shortcoming of the Scythians led to the collapse of their hegemony in Asia Minor?

In 597-595 BC, a terrible threat of Scythian invasion loomed over Babylonia.

Deliverance came unexpectedly. In 595, at the height of the Scythian preparations for the invasion of Babylonia, the Median king Cyaxares lured the Scythian leaders with their retinue to a feast. When the guests, having lost all caution, got drunk, the Medes killed them.

Having lost their leadership, the Scythians suffered a severe defeat and fled behind the mountain ranges of the Caucasus to their native steppes of the Black Sea region.

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Subcutaneous fingerprint scanner 03.11.2015

Apart from the investigative authorities collecting fingerprints at the crime scene, the usual procedure involves the use of scanners. The pad of the finger is placed on the scanner glass, and the light reflected from the finger forms a unique pattern on the image. However, this generally effective method sometimes fails with worn or damaged fingers, and the scanner can be fooled using gelatin finger castings popular in spy movies.

To improve the efficiency of the scientists of the Paris Institute. Langevin developed a new type of scanner that looks under the skin of the finger. The scanner uses optical coherence tomography (OCT), which is used for non-invasive examination of thin layers of skin and mucous membranes, eye and dental tissues of a person. The physical principle of operation of OCT is similar to ultrasonic research, but OCT uses optical radiation in the near infrared range (about 1 μm) rather than acoustic waves to probe biological tissue. In this case, the interference pattern that occurs when two beams of light are combined, one of which serves as a standard, and the second is passed through a biological tissue sample, is studied. In this way, an "internal fingerprint" is obtained, located half a millimeter under the surface of the skin, which exactly repeats the "real" print in its intact form.

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Therefore, those who wish to use fingerprints for home security can be advised to use a device created by American scientists at the University of California. It uses ultrasound to create XNUMXD fingerprints and could one day replace a capacitive sensor mobile scanner that exploits the difference in electrical capacitance between the ridge and the groove as their distances to the sensor pad are different.

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