The sun makes Superman stronger. Spinach bulks up Popeye. For homo sapiens, we have adrenaline. This hormone is produced by the adrenal glands and it primes your body to take on whatever Mother Nature throws your way – sugar goes to your muscles, your pupils dilate, and your heart beats faster. That’s why these earrings are not only great by themselves, but they’re also great when you wear them with our , , and .