Frogs were the ancestors of land vertebrates. [1]
Ancestral frog almost died. Had the ancestral frog of all humanity jumped two inches less on a certain occasion, the whole course of evolution would have been markedly changed. [2] From the briny waters of the seas there crawled out upon the land snails, scorpions, and frogs. They sprang suddenly from fish family. [3]
Among the land animals the frogs reached their climax in the preceding age and rapidly declined, but they survived because they could long live even in the drying-up pools and ponds of these far-distant and extremely trying times. They evolved into prereptiles in Permian. [4] Frogs are the only remaining group representative of man’s earlier ancestors. [5]
There is a saying about the importance of instilling loyalty in children: The quickest way for a tadpole to become a frog is to live loyally each moment as a tadpole. [6]