Creationists do not believe that all of today's living things came about from simple organisms changing or evolving slowly over time. They believe that life was created much as it is today, and that one form of life cannot change into another. While biologists and paleontologists say that fossils are different from the life we see today, and can be put into order to show changes over time. Young Earth Creationism says life was created in a short time, in its current form. They point to the Flood of Noah to account for most rock formations and most fossils. There is also an Old Earth creationism.