The theory of evolution has become a fact to most of those who claim to believe in SCIENCE! Now, it doesn’t matter that they weren’t there or that their theory isn’t observable, testable or repeatable but they spout it as FACT! For instance this article says that ‘Most of us would recognise a human brain, but what about the brain of a frog or fish? Given the vast diversity of life on Earth, there are some weird and wonderful brains out there.
Despite this, the basic plan of most vertebrate (animals with a backbone) brains is similar, consisting of three major regions: the fore-, mid- and hindbrain. But the variation in size and shape between these regions (and others) is what makes studying vertebrates so fascinating.
Research published today by my colleagues and me in Frontiers in Ecology and Evolution indicates some of our earliest ancestors — which were likely still taking their first steps on land — had brains that only filled about half the space in their skulls.‘ https://theconversation.com/when-our-evolutionary-ancestors-first-crawled-onto-land-their-brains-only-half-filled-their-skulls-157418
Sadly, those who believe this stuff aren’t using all the brain they have been given by their Creator either!