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Causes of winter depression

10.11.2014

Scientists have explained why some people suffer from seasonal affective disorder in the winter, while others enjoy the colder months.

Researchers from the University of Copenhagen, Denmark, have found through brain scans that people who experience seasonal affective disorder suffer from a lack of serotonin in the brain, one of the main neurotransmitters associated with feelings of happiness and well-being.

By performing positron emission tomography of the brains of 11 volunteers suffering from depression in the winter and 23 healthy individuals, the researchers found that their serotonin levels declined as the days became noticeably shorter during the winter months. This happens because the brain increases the production of the serotonin carrier protein, which transports serotonin to nerve cells, where it remains inactive.

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Insects can generate electricity 02.11.2022

An international team of scientists has found that swarms of insects can produce atmospheric electrical charges. Measurements showed that they give out as much charge as a thundercloud.

It is noted that bees sense changes in electric fields in order to navigate to flowers. Static charges help pollen stick to them. And in this way, these insects can receive an electric charge when they fly through the air.

"We have always looked at how physics affects biology, but at some point we realized that biology can also affect physics. We are interested in how various organisms use static electric fields, which are almost everywhere in the environment," the author said. a new study by Ellard Hunting of the University of Bristol and the University of Reading.

The researchers placed an electric field monitor near the research hives and measured the changes as swarming began. It turned out that swarms of honey bees increased atmospheric electricity by 100-1000 volts per meter, depending on the density of insects in the swarm.

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