Ever noticed that when you stare at your fingers for long enough they start transforming into alien appendages before your very eyes? You see the mundane for what it really is: freaky-looking. The same goes for the rest of our traits. We take for granted that funny things make us yell out spastically also known as laughing and that we spend one-third of every day in a deathlike state of suspended animation known as sleep. But with a little contemplation, these behaviors seem truly bizarre. Here are 7 weird things humans do every day.
1. Get pins and needles
Hitting your funny bone isn’t very funny. Neither is crossing your legs for too long, or waking up at night with a dead-seeming hand that gradually tingles back to life. What causes that horrible “pins and needles” sensation? It happens when you apply too much extra weight or pressure on a nerve, temporarily inhibiting its function, and then remove the pressure. As the nerve gradually returns to normal, our brain somehow interprets its activity as a tingling sensation pins and needles.
It’s not that strange that we blink: The tenth-of-a-second-long activity clears away dust particles and spreads lubricating fluids across the eyeball. What is strange, though, is that we fail to notice the world plunging into darkness every two to 10 seconds!
Scientists have found that the human brain has a talent for ignoring the momentary blackout. The very act of blinking suppresses activity in several areas of the brain responsible for detecting environmental changes, so that you experience the world around you as continuous.