(0,0)...........................................................
Early hypothesis was not based on experimentation
Newton was a great scientist who gave the world "The Law of Gravitation", which means that in the universe every particle is attracting other particle and the force with which it attracts is directly proportional to the object of their mass and inversely proportional to the square of the remoteness in between their centers.
No it does not insulate the earth
No they all are primary consumers