Oh, hey: Two-liter bottles

This is a picture of a two-liter bottle before it's been expanded.

And here's a video demonstrating how that expansion occurs.



Spotted on TYWKIWDBI. http://tywkiwdbi.blogspot.com/

Oh, hey: Tower Climbers

Have you ever wondered who repairs those really tall radio towers? Me neither. Then I saw this video.

Oh, hey: More than one kind of starfish

Everyone knows what a starfish is. It's a fish shaped like a star.

They have squidgey underbits.

They're not really fish. They belong to a class called asteroidea (Latin for "like a star"). They're in the same family as sea urchins, sea cucumbers and sand dollars.

There are loads of starfish that don't look remotely like the five-pointed fellow above.

Crown-of-Thorns starfish

Pincushion starfish. I want to hug it forever.

Brittle Star

 Sunflower starfish. It's like a tentacle cookie.

Linckia starfish. Should be renamed "Gumby".

NSFW audio on the video below (movie in the background).

Feather starfish

Basket starfish

Starfish are cool.

Credits: Normal Starfish, Crown-of-Thorns, Pincushion, Brittle Star, Sunflower, Linckia

Oh, hey: How a differential gear works in a car's transmission

Cars are a mystery to me. One peek under the hood spirals me into instant confusion. I understand there is an engine, which makes the car go. A battery also makes my car go, and lets me see at night and keeps the radio going. Brakes make me stop. Fuel comes from a fuel tank. The gas cap is toward the rear of my car, but the fuel gets to the engine in the front of my car, probably via a magical expressway populated by oil-stained Gasoline Gnomes.

Frank, honest and hard-working.

My dearest is far more knowledgeable. He knows how to check the levels of fluid and where to pour the various fluids. He can even change a fuel filter. This is magical to me.

Whenever I find a clear, concise explanation for how any part of a car works, I am thrilled. I want to know how my car works, even if I never do anything with what I'm learning about.

Without further ado, here is how a car part works.