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Meteorite from Lake Tagish

01.08.2001

On the night of January 18, 2000, a large meteorite fell on the ice of the Canadian Lake Tagish. It is calculated that before entering the earth's atmosphere, it weighed about 200 tons, but only fragments reached the Earth.

Soon an amateur astronomer living nearby arrived on the scene, and then professionals arrived. They collected a lot of fragments from the ice, especially valuable because they fell in an area little affected by man and were soon picked up, not having time to pick up earthly pollution.

The first results of the study of the find have now been published. The meteorite, as it turned out, belongs to carbonaceous chondrites - a rare class of meteorites rich in organic compounds. Its age is estimated at 4,5 billion years, that is, it is older than the planets of the solar system. In the selected fragments, there were many hydrocarbon molecules, microscopic diamond crystals, interstellar dust and something like clay.

The latter is particularly interesting: clay usually forms only in bodies of water, or at least in the presence of water. Traces of amino acids have also been found. It is assumed that such a composition is characteristic of cometary nuclei.

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Allergy to people 10.05.2002

As you know, people are quite common allergy to dogs and cats. But Scottish veterinarians have recently discovered that pets can also suffer from human allergies.

According to their data, about one in twenty cats or dogs are allergic to their owners. Dandruff or microscopic flakes of flaky human skin can cause rashes or skin irritation in animals.

A sure sign of allergies - these symptoms disappear when the owner is away. In addition, it is possible to suspect an allergy to the host in cases where the animal constantly itches, but there are no fleas on it.

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