If you've never watched it, The Tree of Life is, to me, an existential movie that juxtaposes the insignificance (yet importance) of human life with the vastness of existence as a whole (as well as whole other themes from the duality of nature to familial relations, etc). It does so by focusing most of the film on the lives of a small family in Texas while also showing scenes like this one, which features the creation of the universe, the creation of Earth, and the evolution of life.

Malick is a religious man, and the film opens with a quote from Job:

Where were you when I laid the foundations of the earth?...when the morning stars sang together, and all the sons of god shouted for joy? Job 38:4,7

This scene is pretty much Malick's visual depiction of that argument. If you want to know more about how they did it, you can read so here

P.S. don't worry about Malick's religiosity if you're curious about his films but are afraid of being preached to. I'm an atheist and still love them. It's more a love of nature and humanity than dogma.