The strangest cold knowledge in the world

1. Saudi Arabia imports camels from Australia.

In the eyes of many people, there is no shortage of camels in the Middle East. But this is not the case. There has always been a tradition of eating camels in the Middle East, but the number of local camels simply can't meet the demand.

Because they will import camels from Australia. Although the most famous animals in Australia may be kangaroos and koalas, there are also a large number of wild camels on the Australian mainland. As an exotic species, the number of camels has increased rapidly since they entered Australia in the19th century.

2. 70% of the oxygen on the earth is produced by phytoplankton.

Nowadays, more and more attention has been paid to environmental protection, one of which is to protect trees. Environmentalists usually advise people not to cut down too much, because trees help us make a lot of oxygen.

But what many people don't know is that trees don't produce much oxygen compared with phytoplankton in the ocean. In fact, about 28% of the oxygen on the earth is produced by trees, but more than 70% of the oxygen is produced by marine plants.

It is illegal to die in Longyearbyen, Norway.

Longyearbyen, Norway is one of the northernmost cities in the world, so the weather there is extremely cold. In this seemingly insignificant town, there is a strange law.

Death is illegal in this place, and this law is still valid from 1950. Mainly because this place is too cold, the temperature can be as low as -46.3 degrees, and the current average temperature is-17 degrees.

Therefore, the body can't rot in this place. In other words, if a person dies of an infectious disease, the corpse and the virus in the body will be frozen there, which gives the virus a chance to spread.

The composition of the earth is mainly iron, oxygen and silicon.

When analyzing the substances on the earth, you will see 32. 1% iron, 30. 1% oxygen, 15. 1% silicon, 13.9% magnesium. Of course, most of the iron is in the core. In fact, the study found that the core contains 88% iron, while the crust contains 47% oxygen.

Laziness is a genetic feature.

Regular physical exercise is an important part of a healthy lifestyle, but in modern people's lives, the proportion of physical exercise seems to be declining. Scientists have found that people's laziness may be related to a protein kinase inhibitor α gene, which is low in lazy experimental mice. And this genetic situation is hereditary.

6. If the earth is opened, people can pass through it in 42 minutes.

The earth is a sphere. If we assume that someone has reached both ends of the earth, you can go directly to the other end of the earth. So, once you jump in, how long will it take to get to the other side?

Alexander Kracz, a physicist at McGill University in Montreal, gave his answer. By calculation, he thinks this time should be 42 minutes. Because the length of the whole tunnel is about 12742 kilometers, and the sliding speed in this strange tunnel can reach 8 kilometers per second.