Why aren’t wind turbine blades two or four in number?

Animation simulates the bodily changes that occur during pregnancy

1.4M Views

Why is it so hard to drive a walking tractor?

34 Views

A weapon of extreme simplicity yet formidable combat power: the ancient sling!

23 Views

Why does someone have to risk their life to retrieve a single drill bit?

26 Views

The Magical World

52 Views

Why is printer ink sold for more than champagne?

9 Views

Why do some people wear two electronic ankle monitors on their feet?

13 Views

Why doesn’t the ninja’s bamboo snorkel work at all?

8 Views

Thousands of wires have been severed—how will the master reconnect them?

10 Views

How do submarines vent smoke while submerged?

31 Views

Why did the workers dump clams into the mud?

35 Views

People are already stuck in the mud—why are they still planting rice seedlings?

15 Views

Why don’t motorcycles make their fuel tanks transparent?

14 Views

A pirate dinghy approaches the giant ship—what can the crew do?

21 Views

Why must concrete mixer trucks rinse their drums immediately after work?

51 Views

Why is an iron chain hung in the middle of a minecart tire?

21 Views

Why can others catch crabs but you can't?

80 Views

Why can a single jar spew flames like an engine?

15 Views

Why must steel strands be first separated and combed?

31 Views

Where’s the safest seat on an airplane?

59 Views