Once again, evolution by natural selection answers a big question: Why are some Earth creatures amphibious, meaning able to live on both land and water, and not just one or the other?
Apparently, life on Earth began in water, and amphibians were relative latecomers in the evolutionary chain.
The consensus among evolutionary biologists is that, one fine day, a certain fish used its pectoral flippers to push itself from its heretofore purely aquatic environment onto dry land. We see a similar capability in a certain species of gobi, a curious modern tropical fish also known as “mudskippers,” which are amphibious.
“Mudskippers are found in the Indo-Pacific, from Africa to Polynesia and Australia. They live in swamps and estuaries and on mud flats and are noted for their ability to climb, walk, and skip about out of water,” the Encyclopaedia Britannica explains.
These odd little bulb-headed, bug-eyed critters have evolved over eons to breath oxygen trapped in their gills and through their skin, so they skip back and forth from water to land, although they really like mud, as their nickname implies.A related question about amphibians, for which the cartoon embedded here offers an amusing, if unscientific, hypothesis, is what motivated them to haul themselves onto land in the first place.
Everyone knows that mates have enormous influence on each other and that they annoy each other to no end, so this theory is certainly plausible as one of the motivators of early landlubbing fish. Or perhaps they were just trying to flee predators.
But there’s zero evidence, of course, and much to the contrary from modern science, that mudskippers or any other Earth creature, least of all Homo sapiens, emerged in prehistory in the exact same form they embody today.
With all due respect, the Bible is just wrong about that.