Because evolution didn't happen. Science itself refutes Darwinian evolution. Darwinian evolution is still only a theory, it has never been proven, and thanks to modern science it is now being disproven. It takes far more faith to believe in Darwinian evolution than it does to believe in creation and intelligent design. There is a lot more evidence for creation and intelligent design than there is for Darwinian evolution. A lot of people believe in the theory of Darwinian evolution because they were (and are still being) taught this theory in school. This theory should no longer be taught in school now that modern science is continueously finding more evidence against it. At the time Darwin came up with the theory of evolution, science was not able to disprove it. Darwin's theory of evolution has not been proven. Only 9% of the population now believes in Darwinian evolution.
Scientific evidence casts serious doubts on the theory of evolution, for example:
*Perry Marshall vs. 30+ Skeptics:
From August 2005 to July 2006, he has successfully defended the Information Theory argument for Intelligent Design on Infidels, the world’s largest atheist discussion board.
http://www.cosmicfingerprints.com/iidb.htm
* The Problem of Information
for the Theory of Evolution
http://www.trueorigin.org/dawkinfo.asp
* Information Theory and the Origin of DNA: Frequently Asked Questions
http://www.cosmicfingerprints.com/infotheoryqa.htm
* Biological Evidence
Evolution - Fact or Faith?
http://www.case-creation.org.uk/biolo1.html
*The Case for Intelligent Evolution
http://www.cosmicfingerprints.com/intelligent_evolution.pdf
* If you can read this, I can prove God exists
http://www.cosmicfingerprints.com/ifyoucanreadthis.htm
* Do real scientists believe in Creation?
Partial list of Creation Scientists
http://www.christiananswers.net/q-eden/edn-scientists.html
* New Scientific Evidence for the Existence of God
http://www.cosmicfingerprints.com/audio/newevidence.htm
* How the theory of evolution breaks down in the light of modern science
http://www.darwinismrefuted.com/index.html
* Famous atheist now believes in God
http://www.sciencefindsgod.com/famous-atheist-now-believes-in-god.htm
* Darwinism's Rules of Reasoning
http://www.arn.org/docs/johnson/drr.htm
* Darwinism Is Strongly Rooted But Is Being Challenged
http://www.straight-talk.net/evolution/summary.shtml
* Evidence for Intelligent Design
http://www.straight-talk.net/evolution/intelligent-design.shtml
* Scientific arguments against evolution:
Science itself refutes Darwinism
http://www.straight-talk.net/evolution/arguments.shtml
* Creation Science
http://www.straight-talk.net/evolution/creationscience.shtml
* The Origins of Darwinism
http://www.straight-talk.net/evolution/origins.shtml
* Irreducible complexity
http://www.straight-talk.net/evolution/irreducible.htm
* Anthropic Principle
http://www.straight-talk.net/evolution/anthropic.htm
* Biological Evidence
http://www.straight-talk.net/evolution/biology.htm
* Darwinism is Racist
http://www.straight-talk.net/evolution/racist.shtml
* The Fossil Record (Updated 3 July, 2005)
http://www.straight-talk.net/evolution/fossil.htm
* Living "Fossils"
http://www.straight-talk.net/evolution/living.htm
* The Cambrian Explosion
http://www.straight-talk.net/evolution/explosion.htm
* New T.Rex Discoveries (Updated 10 June, 2005)
http://www.straight-talk.net/evolution/t-rex.htm
* "Missing Links"
http://www.straight-talk.net/evolution/misslinks.htm
* The Moon
http://www.straight-talk.net/evolution/moon.htm
* Earth's Fight Against Solar Attacks
http://www.straight-talk.net/evolution/earthfight.htm
* References
http://www.straight-talk.net/evolution/references.shtml
*DNA and the Origin of Life:
Information, Specification, and Explanation
http://www.discovery.org/scripts/viewDB/filesDB-download.php?command=download&id=1026
* Evolution - Fact or Faith?
http://www.case-creation.org.uk/biolo1.html
* Looking for more information on Intelligent Design?
http://www.arn.org/index.html