What is the main factor that causes two daily tidal bulges to form on earth?

Two tidal bulges are created on opposite sides of the earth due to the moon's gravitational force and inertias counterbalance. 

The soviet union beat the us to the first successful launch, with the october 4, 1957, orbiting of sputnik 1, and later beat the us to have the first human in earth orbit, yuri gagarin, on april 12, 1961. the "race" peaked with the july 20, 1969, us landing of the first humans on the moon with apollo 11

The answer is nucleic acid