To answer this question, we first have to answer: are there extraterrestrials out there?, well, most certainly yes, but we can’t say for sure only because we hasn’t had an encounter yet. Also, the universe is so huge that we can only observe the ‘observable universe’.

*The Universe is so vast that the lights from the Unobservable universe hasn’t reached earth yet, hence its called the Unobservable universe.

To sustain life, a inhabitable planet should have liquid water, which is essential to all life. To have running water, one planet should not be too hot or cold, the perfect zone is know as the ‘Goldilocks zone’.

Time To Feel Insignificant

So how many planets are in the Goldilocks zone?

‘There could be as many as 40 billion Earth-sized planets orbiting in the habitable zones of Sun-like stars and red dwarfs in the Milky Way’

Imagine that, 40 Billion just in Milky Way Galaxy alone, and the nearest of such planet is 12 Light years away.

• Light speed= ~300,000km/second
  That’s 1,080,000,000km/hr
• 7.4 times around the earth in 1 second.
• Fasterst Aircraft in the world: X15 = 7,273 km/h

Will we survive an alien invasion?

Nope, not a chance, and here’s why.

Technology: They could achieve interstellar travels at the speed of light, propulsion systems we can’t even imagine, it would make our chemical rockets look like a piece of rock.
We human are still wondering around our own solar system.

Why nuclear weapons won’t work: Ahh the nukes, it’s the best humanity can come up with, all the nukes combined could wipe ourselves out serval times over, impressive right?!
Well sadly it wouldn’t even scratch the paint, and here’s why:

Space is full of asteroids and derbies left over from the Big Bang, imagine speeding through all this stuff at light speed, plus space is full of cosmic rays, so some kind of shield would be used and therefore any nuclear weapons will be useless.

Our Plan:

Believe it or not,there are military plans for alien invasion, and they take it seriously, they are classified of course, to prevent sabotage.

Heres a guide of what you should do.

There will be nothing left for humanity to do then to stay alive, maybe we will live to fight another day, just maybe.

Such a event can bring us all together.

We can put our differences aside, and build up our bonds as we fight, standing together as humanity. Ronald Reagan always said that our differences would vanish if we are facing a threat from extraterrestrials.

But why does aliens want to visit us anyways?

Now, look at the invaders point of view, you have more then 40 Billion planets to choose from, why earth?

The first thing that comes to your mind is probably water, but our water comes from asteroids that crashed into earth billions of years ago, and there are more water on a single asteroid than the whole of earth, and they dont need to deal with any resistance as well.

Heres where it might gets crazy, maybe they are out for life itself, human beings, and other animals.

There are many reasons why they want the lifes on earth, they could harvest things from us, or use us as Lab Rats.