Eight years later (less than 30 guppy generations), the researchers found that the guppies in the low-predation environment above the barrier waterfall had adapted to their new environment by producing larger and fewer offspring with each reproductive cycle. No such adaptation was seen in the guppies that colonized the high-predation environment below the barrier waterfall.
So, the article uses the term Adaptation - where's the fire?
You missed a few. But still no fire....
...adapted in less than 30 generations ...
...guppies in the low-predation environment above the barrier waterfall had adapted to their new environment ...
...No such adaptation ...
...of many adaptive differences ...
...how well adapted to survival ...
...This shows that adaptive change ...