Why Do Our Stomachs Rumble When We're Hungry?

You're sitting in class, minding your own business, everything is quiet, then it happens. You realize you haven't eaten anything in hours as your stomach lets out a loud growl you swear can be heard all the way down the hallway. People around you pretend like they didn't hear but you know they all did. In this episode, Emma gets to the bottom of why this happens! Plus, Emma starts something big in 2020 and comes up with a potentially billion-dollar idea?