NICE, found what i was looking for:
The Drake Equation
Frank Drake began investigating extraterrestrial intelligence in 1960. He was the first person to consider the different factors (as explained above but here I will give the equation). Here is the Drake Equation which tells us the chances of us meeting aliens.
N = N(s) * f(p) * n(e) * f(I) * f(i) * f(c) * f(L)
Where:
N is the number of communicative civilisations in the galaxy.
N(s) is the rate of suitable stars being formed in the galaxy.
f(p) is the fraction of stars which have planets going round them.
n(e) is the number of planets in each planetary system around a star that is suitable for life. They are in the habitable zone.
f(I) is the number of these planets that life actually is on. It is the number of these planets on which life arises.
f(i) is the fraction of these planets where intelligent life arises.
f(c) is the fraction of these planets on which technical civilisations capable of communicating appears.
f(L) is the fraction of the planetary lifetime during which the civilisation exists. They could have been on a planet and gone so they aren't there anymore. They need to be still there for us to be able to find them!
The above is the Drake equation which considers all the possible factors for us finding intelligent life somewhere in our galaxy.
i for sure think there is life, there is millions of asteroids carrying amino acids which life can build from, if 1 of them hit a planet with liveable conditions, BOOM u have life, and considering our solar sytem is so old compared to others there is a high chance of intelligent species...
