Instructional Video10:41
Crash Course

Serpents and Dragons: Crash Course World Mythology #38

12th - Higher Ed
This week, Mike is teaching you about the most mythic of mythological creatures: Dragons. Cultures across the world (and across Westeros) tell stories of dragons, and their power to destroy, their power to prop up kings, and their power...
Instructional Video5:10
Professor Dave Explains

Venus: Earth's Sister Planet

12th - Higher Ed
The next planet from the Sun after Mercury is Venus. This planet is the most similar to Earth in terms of size and mass, but it wouldn't look and feel the same if you went for a visit. Incredible heat and pressure from the thick...