9 magical and interesting scientific cold knowledge, can you stick to last one?

The world is full of wonders, and in vast world there is always some kind of knowledge that affects blind spot of your knowledge. Let's take a look at some scientific knowledge that will make you wince, and after reading it, you will be amazed.

1. The highest density planet in solar system is Earth, where we humans live. Earth's average density is about 5.5 grams per cubic centimeter, with core density being highest. (Earth is indeed densest Unique!)

2. The universe is a skilled blacksmith. In vacuum of universe, when two pieces of same type of metal touch, they automatically fuse together. Such a miraculous phenomenon is called "cold" by scientists. Welding”! (Natural black technology, but outer universe is really cold.)

3. In fact, nuclear reactors are not patented by people. As early as 2 billion years ago (you read that right) there were nuclear reactors: Oklo Nuclear Reactor. The discovery of this reactor caused people to panic at time, and whole world was discussing whether it was product of an alien civilization. But in in end, scientists proved that it was a purely natural nuclear reactor that reacted for hundreds of thousands of years. No errors!)

4. Are Earth's North and South Poles actually swapped? Some scientists have pointed out that Earth's magnetic field has reversed from north to south hundreds of times over past 70 million years, and rate of reversal is constantly increasing. But no one in this world can explain reason for reversal of Earth's magnetic poles.( Heartbreaker Earth. She'll be here for a while, and she'll be on other side for a while.)

5. The temperature at two poles of Earth can reach over 100 degrees Celsius. According to records, temperatures in world's hottest area can reach 58 degrees Celsius in Libya. The coldest record is a research station in Antarctica in 1983. Measured -89.2 degrees Celsius in 2019 (You wear short sleeves on sunny days in south, while I glide freely on an icy and snowy world in north!)

6. If you could live on earth in ancient times, color of earth you see would probably be purple. Scientists have a hypothesis that differs from current use of chlorophyll to absorb sunlight, In ancient times, plants on Earth relied on light-sensitive optic nerve cells to give plants their purple appearance. (Purple symbolizes maturity...)

7. As they say, more people, stronger hair, and hair too. The scythe can support weight of two elephants. Even one hair can easily lift an apple. There is no problem with quality of your hair. (In future, I will brag to my friends and make a new draft.)

8. In terms of entire history of mankind, number of people who have lived or are living on Earth has reached 120 billion, including you now. (The world boils, world boils, Reincarnation of life and death in blink of an eye.)

9. The blood color of not all creatures in world is red, but blood of an octopus is blue. (Why didn't I notice this while eating fried octopus?)< /p>

Science is strict, but magical and exciting!