Opening a box pierced with a nail. Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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Opening a box pierced with a nail. Focus Secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

Pierce a matchbox filled with matches through a nail - from top to bottom. After this, calmly pull out the box itself halfway on both sides of the case. It will slide easily on the case, despite the nail preventing it!

Focus secret:

In the matchbox itself there is a long slot the thickness of a nail, which makes it possible to slide the box along a vertically inserted nail.

Focus Opening a box pierced with a nail

The nail itself does not move, since it is fixed by the through holes of the case.

Focus Opening a box pierced with a nail

The audience will not be able to see the secret slot when the box is pulled out of the case, since it will be covered from the inside with matches filling the box.

Author: Kuptsova O.

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What do poisonous mushrooms smell like? 02.04.2007

Poisonous plants and animals, as a rule, are distinguished by a bright color that warns that they should not be touched.

Although the poison itself is a good defense, but until the aggressor dies from poisoning, he will have time to cause significant harm. Why do poisonous mushrooms most often not have bright colors and look similar to edible ones?

Canadian biologist Thomas Sherratt thought about this question. Together with collaborators, he conducted a detailed analysis of the characteristics of poisonous mushrooms in North America and Europe. It turned out that poisonous mushrooms, as a rule, differ from edible ones not by their bright color, but by a special smell. Perhaps they have a specific taste, but biologists did not begin to check this on themselves.

What explains the fact that poisonous mushrooms communicate their toxicity not by color, but by smell? Most likely, the fact that the main lovers of mushrooms in nature, for example, slugs and hedgehogs, feed mainly at night and at dusk, when color vision does not work.

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