Carbon

http://www.eoearth.org/article/Carbon

Maybe a little off topic but still great to know.

@Tesla,

Scientists don t know much about life. The truth about H it that it is the smallest element and makes 90% of universe, H+ and ( OH-) are travelers. Hydrogen cycle is not understood well yet. It is all about flow of energy and electrones.

“If you don't know where you are going, any road will get you there”.