17:06

Davis Ranger: Going the Distance

18:27

Soda Syphons: Breaking Out the Bubbly

15:12

We Just Discovered "Dark" Oxygen on Earth - Breakthrough Explained

27:11

You're Probably Wrong About Rainbows

9:51

Viking Sunstone Accurate As A Magnetic Compass! | Expedition Unknown

1:57:24

A Shift in the Earth's Cycles Is Coming - Will It Affect You? | Astrum Sleep Space

14:15

Reflector Gunsights: the Fighter Pilot's Friend

18:35

The Fresnel Lens: the Invention That Saved 1000 Ships