Evidence of how our Moon formed... found?

[A Theist]

Known as Catastrophic Theory: about 4 1/2 billion years ago an object the size of of Mars smashed into the Earth, as a glancing blow creating the Moon from the ejecting material.

Also referred to as the period of "The Great Bombardment". The Mars sized object was theorized to have been traveling at a speed of 250,000 mph when it smashed into the Earth. The debris from the impact formed into two smaller "moons" which circled the Earth at a very rapid rate. The two later collided to form our Moon. So a similar theory goes.