Welcome back to the third episode of our new format for Bizarre Beasts, which we're calling Season Zero. Over the next year, we will be remastering episodes of Bizarre Beasts that were originally created for Vlogbrothers.

Learn all about critically endangered Przewalski's horses, and meet three newborn foals that are the San Diego Zoo's newest residents.

They're the last remnants of a bygone era.

Meet Alexander the Great, one of the most famous leaders in history! Born in ancient Macedonia, Alexander became king at just 20 years old. In this episode, we’ll learn how he led his army across Europe, Egypt, and Asia, creating one of...