What is Impossible in Evolution?

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“Why is there no giraffe-sized chickens” Because they got wiped out by a space rock

"If humans could fly, we'd consider it exercise and never do it" - Ron Swanson

The hills and valleys representation of evolution is actually an incredible way of visualizing it

Some hairless ape: why don't we have giraffe-sized chickens? Dinosaurs: am I a joke to you?

Giraffe size chicken isn’t remotely impossible, that’s a T-rex

"Nature is infinitely creative" - Keep creating crabs...

actually, microscopic organisms have a more "mechanical" way of transport and a lot of biochemical process resemble large scale machines.

Excuses, excuses... I want my zebras with laser turrets!

People : where's the laser zebras?! Evolution : crabs, take it or leave it.

If we all start actively pretending that large arms are super attractive, and seek mates with massive arms, that would be the first step towards a wing evolution.

“You don’t just get something because it’s cool” My financial decisions beg to differ.

I had the EXACT same experience with Return to Oz and the wheelers when I was a kid - the wheeler looking through the keyhole absolutely terrified me

When I first learned about evolution, it was from Pokémon, I was 4 and I sat in a corner trying to evolve. Edit: I only believed evolution works like in Pokémon until I was 8 or 9.

I dont even want wings man i just want the lumbar spine to be able to support us

"We're still not gonna grow wings though." Me: Drinks Redbull

I remember my grandparents having a Trabant. It was loud, stinky, had a tendency to fall apart and if you hit a cobblestone road, it would severely hamper your reproduction capabilities for a few days. Still the flexibility compared to the horse cart we often took to the market at weekends was superb. You also had no heater, so we used to put one of those propane gas canisters on the backseat with a heating unit on it. Oh and the doors stopped working towards the end, so we had to enter/leave through the window. Yeah... "Good" old times, eh? Nowadays even on the countryside every family has at least 2 cars, often more and you even see stuff like Teslas from time to time. Among a lot of tractors and the occasional horse/dog cart.

5 millions years later Laser Zebra: Well guess what.

A lovely way to sum this up would be to state that “evolution is lazy”. Evolution will solve a problem in the easiest way possible. And will never go out of its way to make a species superior.

Worth mentioning that nature makes wheels, or at least rotors at the molecular scale, such as a flagellum, like a propellor for a protist, or the famous "waterwheel driven by protons", ATP Synthase.