Whether it is from science fiction film and television works, novels, or cases reported by eyewitnesses in real life, most of the aliens we know have big heads, pointed chins, and a pair of dark eyes. It has big eyes and a small mouth. It has limbs like us humans and walks upright, but its stature is very short.

But I don’t know if you have noticed that these aliens don’t have teeth! Do aliens need to eat? Or do they not need to chew food? If they don't need to chew, what do they eat?

In our understanding, food is crucial and indispensable to everything in the world. Food can meet the normal physiological and biochemical needs of the body and extend the life span of organisms. For us humans, food not only provides nutrition, but also brings us physical and mental pleasure. Even if you go to outer space, eating is still the number one problem.

Space Food

In 1961, Soviet astronaut Gagarin was the first in human history to enter space. Before taking off, scientists were still troubled by a problem:

Space food

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There is no gravity in space, so what a person eats will not enter the stomach at all.

Thus, Gagarin's first space mission took only an hour, and he ate nothing while in space.

Afterwards, other scientists suddenly realized:

In fact, food has nothing to do with gravity. Food enters the stomach by gastrointestinal peristalsis.

So the second astronaut Gorman Titov was much luckier. The food he received after liftoff was packaged in aluminum tubes, and the "toothpaste food" was delicious when he squeezed the tube wall with his hands. Meat sauce, delicious beetroot soup, and nutritious fruit puree. In this way, the food is successfully put into the mouth in a way that is both simple to carry and convenient to eat.

What might aliens feed on?

You see, even if humans go into space, eating and drinking are the first priority.

Getting back to the subject, no matter how technology develops, whether it is biology or artificial intelligence, they cannot do without the supply of energy. So we might as well make a guess about aliens.

Aliens may survive by eating cosmic rays

According to the British "New Scientist" magazine, scientists have discovered that there is a creature called gold mineral fungus that lives deep in underground gold mines. It does not need sunlight or oxygen, it only needs to obtain energy from the attenuated uranium in the surrounding rocks. To put it bluntly, it can provide energy through cosmic rays.

So scientists speculate that aliens may survive by eating cosmic rays.

Cosmic rays are charged high-energy subatomic particles from the universe. Cosmic rays are fatal to living things on earth, but because of the protection of the thick atmosphere, we can live in peace. However, alien life may be completely different from us. On the contrary, cosmic rays are a source of life energy for them.

The aliens who came to the earth may survive on blood

Many people have always claimed that they have seen UFOs and aliens, and some even claim that they have seen UFOs and aliens. Been abducted by aliens. So, for aliens who have traveled thousands of miles to Earth, what do they eat?

Some people believe that the blood of humans and other animals is the food source for aliens. For them, blood is vital.

Blood, as a substance that transports nutrients and oxygen to cells in the body, contains various nutrients, proteins, enzymes, hormones, metabolites, etc.

In the work "War of the Worlds" by British science fiction master H.G. Wells, the aliens who invaded the earth have no digestive organs and can only sustain their lives by sucking human blood. It’s horrifying to think about it. Human beings have yet to find conclusive evidence of the existence of aliens, but in this vast and infinite universe, there are too many mysteries that we have not yet been able to explore. Maybe aliens really exist, or maybe they just don't eat the fireworks of the world and don't need to eat at all, because their lives are immortal and they have completely broken away from the low-level energy supply mode. These questions can only be left to the future, allowing future science to provide final proof.