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Unit 1 of 4

What an axolotl actually is

Bite 1 of 16about 3 min

Two short reads, then five questions. Tap Start and I’ll take you through it.

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Bite 1 of the Path “What an axolotl actually is.” Two short reads and five questions.

It's a salamander that refused to grow up.

An axolotl is a salamander. Most salamanders start life in the water with feathery gills, then lose them, grow lungs and move onto land. An axolotl skips that part. It keeps its gills, stays in the water and keeps its larval body for its whole life. Biologists call this neoteny.

In the wild it lives in one place: the canals of Lake Xochimilco in Mexico City, where it is critically endangered. Nearly every axolotl alive today lives in a lab, an aquarium or someone's living room. The pink ones you see online are a captive-bred color. Wild ones are dark and mottled.

The one line to keep: An axolotl is a salamander that never finishes growing up.

Question 1. So, an axolotl is a…

Fish with legs
Salamander that keeps its larval body for life
Lizard that lives in water
Baby frog that grew gills

It doesn't scar. It rebuilds.

Most animals patch a wound. Skin closes over it, a scar forms, and whatever was lost stays lost. An axolotl does something else. Cells at the wound forget what they were and gather into a bud called a blastema.

That bud regrows the whole missing piece: bone, muscle, nerves and skin, in the right order and the right place. Weeks for a young one, months for an adult. It can do it again and again, and it never leaves a scar.

The one line to keep: Other animals seal the wound. An axolotl regrows the part.

Question 2. An axolotl loses a leg. What happens first?

A scar seals the stump
Cells at the wound form a bud called a blastema
The leg bone grows back on its own
It grows a thicker tail to balance

Question 3. An adult axolotl regrows a leg ____ than a young one does.

slower
faster
never
twice

Question 4. An axolotl can regrow parts of its heart and brain, not just limbs.

True
False

Question 5. “If you cut an axolotl in half you get two axolotls, like a worm.” What do you say?

Yep, that's the regrowth thing.
No. It regrows lost parts, like a leg or its tail. It can't survive being halved.
Only the pink ones can do that.

Now picture it for the thing you actually need to learn.

Your onboarding doc. Enough F1 for Sunday. The contract you’re about to sign. Same loop, your topic.

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