Where with the nuclear waste?
Radioactive waste|photo:Photobank Profimedia
The Czech nuclear energy industry has been dealing with Nerudov’s “where to go with him” for thirty years. Our nuclear power plants store spent fuel on their sites. After being removed from the reactor, it must cool down and is then moved into containers resembling barrels. They have a lifespan of up to 100 years. The chairperson of the Office for Nuclear Safety, Dana Drábová, says that the search for a deep repository is more of a consolation for the opponents of nuclear energy than a technical necessity. Or is there really no other way?
Do sharks have to swim all the time?
Blue shark |photo:Professional media
Sharks are said not to fall asleep because they would sink to the bottom and drown. That is why they are said to swim constantly, even during their sleep. Biologist prof. Jaroslav Petr presented new research on sharks that disproves this theory. It depends a lot on the type of shark. Someone can take a nap on the bottom and not suffocate. Why should he? What complication do sharks have with breathing that they are forced to move all the time?
The first circumnavigation of Africa
of Bartolomeu Dias – Age of Discovery
From the travelogue Milion by the Venetian merchant Marco Polo from the end of the 13th century, Europe learned about the wonders and wealth of East Asia. News about India, from where pearls, precious stones and especially spices were imported to Europe, aroused the greatest response. However, Christian merchants came to India very rarely. The Muslim rulers of the transiting countries earned up to 40% of their price from transit fees, and the route was also threatened by the military successes of the Turks. And so people tried to reach India by sea. On February 3, 1488, the Portuguese navigator Bartolomeu Dias was the first European to sail around the southern tip of Africa. We reminded you of this in the column It happened this day, which is prepared by Ing. Francis Houdek.
Why do polar bears and brown bears interbreed?
Brown bear|photo:Professional media
It’s called pizzly bear. The designation was created by combining the words polar and grizzly. He suggests that it is a cross between a polar bear and a grizzly bear. These hybrids have been observed in Alaska and Canada. The hybrid has the markings of both bears and a golden color. The problem is that it is viable and fertile. Does this spell trouble for the bears? Will the situation worsen as global warming continues? Zoologist Jan Andreska spoke about the hybrid.
Reward for Fermat’s Big Theorem
In 1637, Pierre de Fermat confused mathematicians in an incredible way. He asked himself if the Pythagorean theorem a2 + b2 = c2 also applies to higher powers, i.e. the third, fourth, fifth, etc. He found out that it did not, and claimed that he had proved it. But the proof did not survive and famous mathematicians searched for it in vain. The problem was forgotten until a certain man announced a reward of 100,000 Reichsmarks for whoever could find the proof. But instead of a solution, it brought complications, as doc. Mirko Rokyta, dean of the Faculty of Arts, UK.
How to make money from chemophobia?
Chemistry|photo:Unsplash photo bank
Many people have a morbid fear of chemicals. They intuitively feel that anything containing chemicals must be unhealthy or even dangerous. Such people tend to succumb to various fraudsters who try to sell them their guaranteed natural and safe recipes, which are said to be not only healthy but also medicinal. In the book Chemical Phobia, James Kennedy shows how far it can go and how life can be lost because of fraudsters. Lukáš Král reads from a book published by Grada.