Harrison's dentist explains how cavities are formed and what to do to prevent them.
Harrison conducts an experiment to find out what will happen to eggshells (and teeth) when exposed to juice, vinegar, or cola.
Soft bodied invertebrates have no bones or major hard parts, which gives them some big advantages.
Many of the earth's scariest creatures are actually just trying to survive.
Get inspired by all-access stories from the wild side of life.
Myth-busting meets natural history with Tim Warwood and Adam Gendle. If you're attacked by a bear, should you play dead?