Just because it's the weekend doesn't mean you have to switch your brain off completely. Smarter Every Day continues its video series on the physics behind helicopters with a look at how choppers use something called a swashplate to vary the pitch of its rotor blades to climb higher and fly in any direction.
So How Does The Horizontal Spinning Blade On A Helicopter Propel It Forward?
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If you’re a dog person who has suspected that your four-legged friend may know exactly what you mean when you use certain words or phrases—for example “toy,” or “car,” or maybe even “who’s the good boy?” (he is) — you may be correct.
The Antarctic is no stranger to weird sounds, from ancient trapped air bubbles popping to entire ice sheets disintegrating. Now we can add another freaky track to the ouevre of icy masterpieces.