Human Body
| Short-term memory:
The short-term memory can keep up to 7 random facts.
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| Earth
| Tectonic plates:
The tectonic plates move really really slow - 2.5 cm a year. That's almost as fast as the nails on your hands grow.
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Plants
| Fossils:
Fossils of tropical plants are found far North, in Alaska. That's because long time ago the North American lands were located on the equator.
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| Human Body
| The Ostrich Footed:
There's a tribe living in the west of Zimbabwe called the "ostrich people". Their name comes from the fact that they have only two toes on their feet. Don't believe me? Take a look at this guy:
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Human Body
| The sneeze center:
The sneezing center is located in the brainstem in a region called the lateral medulla. The information that reaches that part of the brain comes through several nerves including the so-called trigeminal nerve, which carries a wide variety of signals. Some people sneeze while looking at the sun because the irritation of the eyes is misinterpreted as sneeze signal. Sneezes can also be triggered in men by an orgasm.
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| Human Body
| Why is yawning for?:
Despite the popular belief, yawning is actually meant to wake up your body and make it more alert. Animals also yawn and they are observed to do so in intense and threatening situations.
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Human Body
| Brain power consumption:
Your brain consumes less energy than your refrigerator's light - only 12 watts. That is about 1/6 (17 %) of the body's total energy.
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| World
| Why you can't hear phone conversations in a noisy room:
Your phone doesn't make it easier for your brain to hear the voice coming from the other side of the line. That's because the noises in the room that you are in get mixed with the sound that's coming from the other phone. To hear better, just cover the mouthpiece of the phone.
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World
| Yoyo:
Yoyos used to be a weapon back in 1500. In Tagalog, "yoyo" means "come-come".
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| World
| Visible light:
We all know that there is some part of the light spectrum that we can perceive and some that we can't. But how much light can the human eye see? Imagine that the whole spectrum of light is a film tape that is 36,000 km (20,000 miles)long. Then the visible light will be only one frame that is located somewhere in the middle...
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