9 Scientific Cold Facts You Might Not Know Yet, Friends, Come See

1. Take two objects of same weight but different sizes at same time. At this time, you usually feel that larger object is heavier, and this phenomenon is called illusion of size and weight.

2. To date, world's lightest material is all-carbon graphene airgel. 99.8% of its mass is air, but it can withstand substances up to 4,000 times its own weight.

3. Using 300-500MPa ordinary water pressure, it can cut 20cm thick steel sheet, which is principle of water jet cutting.

4. We all know that there are 24 hours in a day, but about 4.5 billion years ago there were only 4 hours in a day. Since then, moon has been getting closer and closer to moon. About 3.5 billion years ago, day was changed to 12 hours, and later, before appearance of man, time of day was only 24 hours, because. 24 hours is more in line with biological time of human body. If there are only 4 hours in a day, people really cannot survive.

5. By applying a certain amount of pressure to peanut butter, it becomes an artificial diamond. The carbon found in peanut butter can be used to make artificial diamonds. To be precise, it is carbon found in peanut butter instead of peanut butter that produces diamonds, but its impurities are so high that resulting diamonds have little color difference.

6. Spherical objects retain heat best. When animals hibernate, they curl up, pressing their head and limbs against their chest and stomach, and their fur unfurls to help conserve heat loss. .

7. After research, it turns out that sea will indeed come to "big aunt", which is legendary "

", at that time plankton in sea increased dramatically, which led to a change in color of reservoir.

8. According to a study by scientists, early Earth can be called a "purple ball" because a common purple pigment molecule called retinal in early Earth produced metabolic energy from sunlight, which may be earlier than evolution of chlorophyll and photosynthesis. As a result, entire planet appears purple, like a purple sphere.

9.The clouds in sky seem to be moving very slowly, but in fact they are moving very fast, and speed of clouds depends on speed of wind, and fastest speed reaches 200 kilometers per hour.

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