In ancient China, emperors eagerly sought out a magical drink that would grant them eternal youth—and alchemists continued attempting to concoct this supposed miracle cure, commonly known as the "Elixir of Long Life," well into the 19th century. Sadly, it seems that no one has quite figure...

Over the last few years, there's been a lot of buzz about probiotics, the so-called "good" bacteria that reside in the gut. They're believed to offer a wide range of health benefits, from a robust immune system to improved digestion. Not long after we started hearing about probiotics, prebioti...