Scientist have several ideas why humans can high five each other instead of high four or high six. One theory suggest four fingers and a thumb on each hand are perfect number and length to grip objects firmly.(Another theory suggest we can grasp more things with just thumb and index finger:other 4 are spares.)
The process of evolution determined the most beneficial number of finger and toes for our survival. Pandas, after all, have thumb like digits to help them grasp bamboo shoots, while some birds have quadruple digits for perching and tucking away during flight. Occasionally babies are born with extra fingers and toes (a condition known as polydactyly), but those additional digits have never offered enough of an edge to survive later generations. In other words, evolution determined that five fingers per hand are just right for humans.
Video on this topic-
No comments:
Post a Comment