Earth

In general, when a spacecraft, probe or rocket wreckage re-enters the atmosphere, they are fast, reaching several kilometers per second or even faster

Earth is the only home we have in the universe and the only planet we know of so far that has life on it, and because of this, we usually think of it as a perfect planet.

If we dig up all the sand in the Sahara Desert, then we can see the "bedrock" of this desert

Since there are many lakes in China, many of them have the title of "largest".

How long can humans survive on earth? This is a question that many of us want to know, and i believe that we do not want to wake up to a "Purgatory" Like venus, and hope that the earth can remain alive forever, so that we humans can continue and our generations can survive on earth forever. If the earth's environment were to change drastically and become an extremely hot planet like venus or mercury, then naturally everything in the world, including humans, would not be able to exist.

The earth was born more than 4 billion years ago, when it was very different from the earth of today, one of which is that the environment of cosmic space is more different.

In the Arctic Siberian region, there is a huge crater called "the mouth of hell"

The seven stars in a row are Saturn, Neptune, Jupiter, Mars, Uranus, Venus and Mercury in the solar system.

Dinosaurs left a fascinating chapter in the evolution of life on earth, first appearing some 230 million years ago and "Ruling" The planet for 160 million years. To this day, there are numerous dinosaur fossils scattered around the world, still silently telling us of their former glory.

The earth's water resistance comes from the high temperature, pressure and density of its interior