3 scenarios exposed to aliens

When contacting aliens, what will happen? NASA scientists put forward a scenario of anticipating problems .

What happens if aliens appear on earth?

Scientist Shawn Domagal-Goldman of NASA's Planetary Science Division and colleagues at Pennsylvania State University offer a scenario with different situations if humanity meets aliens.

The researchers made 3 scenarios at 3 different levels: beneficial, neutral and harmful.

The beneficial case is that when exposed, aliens will increase their knowledge and work together with humanity to solve global problems. Or humanity on Earth will help civilizations less developed.

Aliens will attack humanity to protect their civilization.(Photo: Guardian)

Neutral case is when civilization of humans and aliens is too different. Both will not feel useful to connect with each other.

The unexpected case is that aliens can attack and wipe out humanity with a more advanced and unfriendly civilization. Aliens can also be like people growing very fast and need to expand to avoid the risk of extinction. Then it might destroy humanity to protect its civilization.

'Green' aliens may oppose the destruction of human environment and wipe out humanity to protect the planet.

The scenario suggests that an increase in greenhouse gases can make aliens think humanity is threatening them.

The changes in Earth's atmosphere are evidence for the development of civilization that is out of our control. This will make us a more serious threat to aliens. If we reduce emissions, we can save humanity from the aliens' preemptive attack, scientists say.

"These scenarios give us reasons to limit our development and reduce our impact on global ecosystems ," the scientists said.

Even if the aliens cannot be contacted, this scenario is still valid because it outlines the future pathway for humanity to help humanity's civilization last long and avoid collapse, The script is good.

What if you meet aliens?

In a recent survey in the US, more than 2,000 people were asked what they would say if they met aliens.

Many interesting answers have been given, in which most people are curious about the life of aliens such as eating, sleeping, chatting .

Aliens also "dry"?

Next are questions about whether aliens plan to attack and harm the Earth?

However, besides the courageous people who can calmly talk to aliens, many people show fear that if they meet aliens, they will drive them away and not let them come near the.

Although the alien scenarios are given quite a lot, the reality shows that, so far, human knowledge about aliens is very limited.