Mutations happen all the time.
After the Chernobyl nuclear disaster people started to see mutant frogs around the area of the disaster with extra limbs.
This was seen as evidence for the dangers of radiation.
It turned out it was not as simple as it first appeared.
Further research discovered that any clutch of frog eggs will spawn frogs with extra limbs.
What was missing at chernobyl was the predators.
I read this in the science of the disc world 4 so do not have any links.
After the Chernobyl nuclear disaster people started to see mutant frogs around the area of the disaster with extra limbs.
This was seen as evidence for the dangers of radiation.
It turned out it was not as simple as it first appeared.
Further research discovered that any clutch of frog eggs will spawn frogs with extra limbs.
What was missing at chernobyl was the predators.
I read this in the science of the disc world 4 so do not have any links.
You can fix ignorance, you can't fix stupid.
Tinkety Tonk and down with the Nazis.