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Insects get old too

18.01.2019

New research by scientists at the University of Exeter shows that insects that live in the wild and have a very short lifespan "age" by losing some of their physical abilities before they die.

Scientists have already been doing research to understand whether insects - such as field crickets, whose adult life lasts only a few weeks - experience "aging" in the sense of a decline in physical strength. As a rule, insects were observed in the laboratory, not in their natural habitat, and even if they "aged", it was possible that this was only because they were taken out of their usual environment.

The researchers used a network of more than 130 video cameras to study every hour of the life of a population of wild crickets in a meadow in Spain. They controlled the reproduction, aging and survival of insects for ten years.

Scientists have not found any evidence of a "compromise" between the desire to reproduce at an early age (depending on when the cricket hatched, began to fight rivals and win) and survival. But crickets that put more effort into reproduction did show signs of "aging": they began to chirp less and lose battles to their competitors more often.

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vegetable mine detector 12.06.2006

Danish botanists have bred a variety of small weed - rezushki, the leaves of which change color if a mine or explosive is found in the soil under the plant.

Under the influence of small doses of nitrogen dioxide, which is slowly released during the decomposition of TNT, the leaves of the cress turn red. You can visually identify the mines left in the ground after the hostilities.

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