Where do bees live that are able to kill hornets by overheating? Detailed answer

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Where do bees live that are able to kill hornets by overheating? Detailed answer

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Where do bees live that are able to kill hornets by overheating?

Japanese beekeepers prefer to breed European bees, which are more honey-bearing than the endemic Japanese bees. However, the hives are often attacked by the Japanese subspecies of Asian huge hornets, one individual of which can kill forty bees in a minute.

Local bees, unlike European ones, have learned to resist these hornets. Several hundred bees gather around the predator in one large ball and work with muscles, heating the air inside the ball to 47 ° C. A hornet that can withstand a maximum temperature of 46 ° C dies from overheating.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

Who built the first lighthouse?

Can you imagine a highway with absolutely no warning signs for damage, intersections, curves, nearby towns and centers? Naturally, sea routes also require exactly the same signs, and the lighthouse is one of them. Its light shows sailors the way to the port, with its help they can determine their position in the sea, its light warns ships of dangerous reefs and rocks.

The first lighthouses were small towers, on top of which stood metal baskets with burning wood or coal. They probably began to appear as soon as people began to go to sea, that is, thousands of years ago. Nobody knows exactly when they appeared. But it is known for certain that in the 1th century BC. e. there was a well-known lighthouse that stood on Cape Sigeum near the Hellespont. The most famous lighthouse of ancient times was the Pharos marble lighthouse in Alexandria, Egypt, named after the island on which it stood. Today, its cost would be estimated at $ XNUMX million, it was recognized as one of the seven wonders of the world. In the III century BC. e. the fire that shone on its top showed the ships the way to Alexandria.

The Romans built many famous lighthouses, for example in Boulogne, in what is now France, which operated until the XNUMXth century. Their lighthouses were small and poorly built compared to modern ones. Now every country with a sea coast has a commission in the government that deals with the construction and operation of lighthouses.

When a lighthouse can be built on land, its construction is quite simple and it does not cost too much. But when it is built on a rock that is constantly overwhelmed by waves, or on quicksand, or on shallows, difficult engineering problems must be solved.

The lighthouse tower may be built of hard stone, such as granite, or lined with stone, or consist of a reinforced concrete structure.

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