Have you ever thought about getting a belly button tattoo? If the answer is no, you're not alone: it's not exactly the most common place to get inked, but that doesn't mean you shouldn't consider it.

Your belly button might seem like nothing more than a remnant from your time in the womb, but this small area can actually provide valuable clues about your digestive health and overall wellbeing.

A professor of ecology and radiation studies at Leibniz University in Germany, Steinhauser would love to talk about the important environmental research his team is conducting. But back in 2009, he ...