Question Time

I think that speed limits must have come in with cars (although I suppose the first limits could have come in with something like “Light Canter Only. Any Galloping Will Be Punished.”). Did they come in immediately? Or was it only after cars started picking up speed that setting limits became necessary? Did the speedometer [...]

I can understand them going brown as a decaying thing, but why red? Is it on the colour path to brown? Does the colour change depend on the classification of the tree? And what about the timing? Do trees have an internal clock they go by? Or is the leaf colour change a reaction to [...]

What’s the process? how long does it take? And why are the freshwater ones all wonky? Question suggested by woollythinker. Thank you!

Blue, that is. And why the shades? Why is the sunset red and orange, and is it related to the shades part above? Why don’t I remember these basic facts about the planet we live on?

When was the first black and white TV available? How long after that before colour TVs came out? What’s the longest running show? How about in SA? Additional question (but tough to answer, and a biased question): why is there nothing good on?  

What are the current estimates for when branches of evolution split off? When did soup become fish, and so on? How long have humans been around? How reliable are these numbers, and how are they calculated? Side question: what did Darwin contribute to all this? Did he just introduce the idea of evolution and how [...]

Sploosh! Humans are made of mostly water. As are cucumbers. What are the percentages, and what else has silly high water percentages that you wouldn’t expect?  

Different bits of the brain are linked to different things, but what? Medulla oblongata, cerebral cortex, where are they, what do they do?  

Poo! Not Pooh. Why is poo brown? Lowest common denominator colour? Stomach acids do something to the colours? Hat tip: the shit got stirred in the About comments. Update: Shit just got real: answer. Thank you, shit-stirrers!

The moon, yes. But how exactly? Update Summary of answers ↓