Eating is a complex process. Learn about how your mouth, esophagus, stomach and intestines work to make food digest. STEM Challenge: making enteric-coated tablets.
The Great Lakes only national marine sanctuary brings underwater history up close. Whether you’re in a glass-bottomed boat, looking down from a kayak, or diving underwater, the shipwrecks at the Thunder Bay National Marine Sanctuary give you a haunting look at the past.