" you must have carbon.23  Arsenic, boron, and silicon are the only other elements on which complex molecules can be based, but arsenic and boron are relatively rare and, where concentrated, poisonous to life, and silicon can hold together no more than about a hundred amino acids. Only carbon yields the chemical bonding stability and bonding complexity that life requires. Given the constraints of physics and chemistry, we now know that physical life must be carbon-based. "

― Hugh Ross , The Creator and the Cosmos: How the Greatest Scientific Discoveries of the Century Reveal God