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Did you know that when the astronauts who landed on the moon returned to the earth, when they were asked what it was like to look at the earth from the moon, why did they all express fear?

Let's take a look at what animals are 10,000 meters under the sea?

Scientifically imagine experiments, learn together happily, and feel how small you are in the universe

Earth is the third planet from the sun and the only celestial body known to harbor and support life. About 29.2% of the Earth's surface is landmass consisting of continents and islands. The remaining 70.8% is covered by water, mostly by oceans, bays and other salt water bodies, but also by lakes, rivers and other fresh water bodies, which together make up the hydrosphere. Most of the Earth's polar regions are covered in ice

Interesting astronomical knowledge video, use our imagination to see what exoplanets look like like we look at the moon

Saturn is one of the eight planets in the solar system and the sixth in the solar system by distance from the sun

Look at the hot "wall of fire" in the universe

Let's see what is it?beware of danger

Would you like to try some matches? Well I'm just joking

Happy to try with a small hoe?

Meteorites, also known as "meteorites", are unburned stone, iron, or mixed materials of stone and iron that are quickly scattered on the surface of the earth or other planets by cosmic meteors or dust fragments that have escaped their original orbits.

The speed of light refers to the speed at which light or electromagnetic waves travel in a vacuum or medium. The speed of light in a vacuum is the maximum speed found to move objects in nature

Although dinosaur fossils have existed on the earth for tens of millions of years, it was not until the 19th century that people knew that such strange animals once existed on the earth. The first person to discover dinosaur fossils was a British physician named Gideon Mantel, and the British paleontologist Richard Owen coined the term "dinosaur"

Mosquitoes are the most important medical insect taxa. Mosquitoes are widely distributed and there are many species. So far, 3 subfamilies of mosquitoes have been recorded in the world.

The study of past and present life is still a mystery

Very interesting planetary comparison, let us know the difference between their sizes more intuitively

For the convenience of research, dinosaurs can be divided into birds and non-avian dinosaurs. Among them, non-bird dinosaurs lived only in the Mesozoic (Triassic, Jurassic and Cretaceous), and were all extinct 65 million years ago