TMW Media
Cylinders, Cones and Spheres: Calculating the volume of a sphere
What is the formula to calculate the volume of a sphere? Given the radius or diameter, how do you calculate the volume of a sphere? Cylinders, Cones and Spheres, Part 6
TED-Ed
The Deadly Irony of Gunpowder
Gunpowder has played a key role in shaping civilization as we know it today. Trace its evolution from its beginnings in the mid-ninth century when early Chinese alchemists worked to create a potion for immortality, through its use...