Did you know the reason why all school buses are yellow? It is because the human eye sees the color yellow faster than any other color. Why? The answer comes from the physics of light and optics. More light is reflected by bright colors, resulting in excessive stimulation of the eyes.
The average pencil holds enough graphite to draw a line about 35 miles long or to write roughly 45,000 words. History does not record anyone testing this statistic.
French researchers also hit on the idea of using caoutchouc, a vegetable gum now known as rubber, to erase pencil marks. Until then, writers removed mistakes with bread crumbs.
The mechanical pencil was patented in 1822. The company founded by its British developers prospered until 1941, when the factory was bombed, presumably by pencil-hating Nazis.
It is well known that any exercise that makes your heart beat faster, like running or playing basketball, is great for your body and can even help improve your mood. But scientists have recently learned that for a period of time after you've exercised, your body produces a chemical that makes your brain more receptive to learning. So if you're stuck on a homework problem, go out and play a game of soccer, then try the problem again. You just might discover that you're able to solve it.
It is believed that humans experience 70,000 thoughts each day.