How many galaxies are in the universe? Do you think there are life forms living on other planets?
There are 100 billion galaxies in the universe and 100 billion stars in each galaxy.So,don’t you think there can be another Earth?For life, mainly water is required.When traces are there in our own Solar system i.e. on one of the Saturn’s moon -Enceladus,then why not any where else in this ever expanding and vast universe?The second thing required is oxygen, whose traces are nowadays found in many planets.Hence according to me, life forms are possible as I think, it is not necessary that life means only those present on Earth, therefore the proportion of gases can vary for other life forms.