DOGITAL DATA
Scientits have several ideas why humans can have five each other instead of say high-four or high-six. One theory suggests four fingers and a thumb on each hand are the perfect number and lenght to grip objects firmly. (Another study suggests we can grasp most thing with just our thumb and index finger if necessary the other four fingers are spares.
The process of evolution determined the most beneficial number of fingers and toes for our survival.pandas after all have thumblike 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 golf an edge to survive to later generations. In other words evolution determined that five fingers per hand are just right for humans.
Why do I have thumbs?
having no thumb would make you all thumbs fumbling to tie your shoes or assemble a hamburger.(Don't believe us? Tape one of your thumbs against the side of your hand and see how hard life becomes) we inherited a fully "opposable" thumb named for its ability to close tip to tip against our other fingers from our primate ancestors around two million years ago. These ancient relatives needed handier hands to help get a grip on simple tools. So give a thumbs up to your thumbs they're the mains reasons you can text with one hand and build a burger without fumbling the bun.
WHY DO I HAVE FINGERPRINTS?
Those whirls,swirls,loops,and arches on your fingertips and toes in case you didn't know are unique to you even if you have an identical twin and they remain unchanged throughout your entire life. In fact the faint ridges known as FINGERPRINTS. From before you're even born fluids in the womb put pressure on your developing digits which combined with your rate of growth and genetic makeup create on of a kind design.
Okay, but why do I have fingerprints?
Ah, you want to know the point of those fingertip design (well besides incriminating crooks who forget to wear gloves) scientists have put fourth all sorts of possible reasons. Fingerprints might magnify the hands ability to defeat vibrations for us grip object speaking of which...
WHY DO MY FINGERS WRINKLE IVE BEEN SWIMMING?
You might think that playing in the pool or soaking in the tub makes your fingertips and toes waterlogged and soggy. Not so! The prune effect is caused by blood vessels shrinking Just below the skin an automatic reaction triggered by your nervous system when it senses long exposure to water. Scientists think people evolved this reaction to improve their grip and traction in wet environments After all pruny fingers make it easier to sang slippery fish.
WHY CAN I POP MY KNUCKLES?
when you move or bend your fingers you occasionally squeeze tiny air bubbles that form in the protective fluid around your body's joints. Those popping bubbles create an audible crack
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