Young Earth Creationism is a variant of Creationism but more absurd and unfounded. YECs believe that everything was created over a period of six normal-length days, but it happened approximately 4004 BCE. Yes, they believe that everything in the Universe is only six thousand years old, believe it. Young Earth Creationism is junk-science and junk propaganda and many branches of science can prove this, including astronomy, geology, and physics.