"You walk through a labyrinth of MIT buildings and into what looks like a typical laboratory: white walls and clean counters, the constant buzz of machines, the clutter of pipettes. In the corner, you open the door to a hulking freezer. When the puff of frosty air clears, you see stacks of plastic bottles filled with what looks a little like smoothies — in tawny, rusty colors Odwalla would never market. That’s your first hint of this lab’s unique purpose. Then there’s the giveaway: on the sterile countertop, you see a trophy of a squatting muscleman, labeled “Most Generous Donation.” Welcome to the first national stool bank. It’s like a blood bank, but for fecal matter. And that brown smoothie is actually very healthy stool, parasite-free and loaded with happy bacteria."
Here's the full piece.