The gene that makes mustard explosively spicy

It takes a special species like Homo sapiens to devour something designed to fend off predators. Given our obsession with spiciness, it's astonishing that we haven't simply decided that eating thornbushes is truly delicious. Now that scientists have revealed the gene responsible for mustard spiciness, I predict we're… » 8/31/12 8:30am 8/31/12 8:30am