Evolution flies in the face of the basic scientific principle that all the universe moves from complex forms to simpler forms.
This principle is false. Which is more complex, a hydrogen atom or a hydrogen molecule? The hydrogen molecule is more complex, yet if you take two hydrogen atoms there is no way to keep them from forming a molecule.
Which is more complex, a single amino acid or a protein molecule? The protein molecule, of course. When scientists make their best guess as to what the world was like 4 billion years ago, and simulate the conditions, proteins form out of amino acids with incredible ease.
That is because the natural state for hydrogen is as a moelcule. The same proves true for some biological components, protiens among them.
The problem comes from getting these simple forms to form more complex forms. Soem chemical reactions do occur naturally. They are rare and usually non-sustainable. Eventually the energy for them will dry up and we will no longer get the chemical reaction allowing for complex structures to be formed.
There is also no case where something goes from the equivalent of an amino acid to somethign as complex as a human being without masive outside influence. Silicon does not form computer chips on its own.
Evolution is the only scientific theory that says something as basic as amino acids can develop into something as complex as even our relatively simple circulatory system without an outside influence.
Unless, of course, you accept that there is an outside influence.