Little green men

Which always runs parallel to the uprise in the consumption of hard liquor.

 

Careful......... there is barely enough intelligent life on this planet

 

By which you must mean just animals, plants and microbes, FC

 

I'm flattered that you included me in the list @ARMANDII - slightly disconcerting that I was after microbes, but hey - - a guy has to take compliments when he can..

 

You'll notice that I didn't include myself

 

Ah, but you are automatically included due to the fact that you demonstrated your intelligence by putting me on the list

 

Well, the Earth is reckoned to be around 4.54 billion years old while the Universe, according to current thinking, is around 13.8 billion years old but with basically Trillions of stars out beyond our Solar system in other Solar Systems and that other Solar Systems are older than our Sun, I reckon the age of the Earth is still, astronomically speaking, quite young. The incomprehensible, to me, number of Galaxies beyond our own Milky Way, which itself has around 200 to 400 Billion stars in it, is according to current estimates over 500 Billion!!. But since we can only see a minute fraction of the Universe that's a guess at best.
According to the latest research comparing the ratios of hydrogen isotopes over time some of the water in our oceans is older than our Sun!!! NASA now believes that there's water just about everywhere in the Universe in one form or another either on Planets, Comets, Asteroids etc.
The furthest Star from Earth known to us is "just" 13 Billion Light Years away....since a Light Year is around 6 Trillion miles you do the maths!! But that means the light from those Galaxies left them 8 Billion years before our Sun and planets were formed
Now, I'm a Doubter of many things but the sheer unbelievable vastness of the Universe convinces me that the mathematical odds of Life other than us, more advanced or less advanced, is so high in my opinion as it to be a certainty.