Boron


 * Boron is an essential nutrient for all green plants.
 * Boron in its crystalline form is very unreactive while amorphus boron is reactive.
 * The universe's atoms of boron were not made by nuclear fusion within stars and weren't made in the big bang. They were made by nuclear fusion in cosmic-ray collisions. Most of the universe's boron was made in this way before the formation of our solar system.