The modern Earth's atmosphere is so rich in oxygen that the vast majority of this hydrogen will be re-oxidized to water without escaping from the Earth's top atmosphere

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

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

The earth has been spinning since its inception and has been doing so for 4.5 billion years now, so why has it not stopped yet?

In this 5.5 million-year-old cave, not only is there no sunlight, but the environment is also very harsh

If humans evolved from the forest archaeopteryx, how did the forest archaeopteryx emerge?

The legendary prehistoric civilization is not the only one "Atlantis", then this mysterious "yellow brick road" could be the remains of some other prehistoric civilization left behind?

With the progress of science and technology, human beings have now begun to increase their efforts to explore the universe and the ocean. With the help of advanced submersibles, more and more people have the opportunity to dive into the deep sea thousands of meters deep for research. It is also with the arrival of human beings that we found that there are some things in the deep ocean that should not exist, which are worrying.

In orbit for longer and longer periods of time, we need to solve not only inorganic resupply problems such as food, water, oxygen and propellant, but also the various problems faced by astronauts flying in orbit for long periods of time

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