Fatigue, shortness of breath, or boredom Yawning is very interesting. It has many possible causes and several different theories on how it came about for humans, but none are definite. The definition of yawning varies across cultures. Only 7% of the world’s languages have a word that precisely …
To transfer the oxygen in the air to our bloodstream Our body is quite durable. We can survive a few weeks without food, and under normal conditions, we will last a few days even without water. On the other hand, if we stop breathing, we will not last …
Why do we breathe? Read More »
A traffic light light is a system of lights placed at busy intersections to control traffic crossing. These systems help reduce congestion by allowing crossings only on the green, not red or amber. The light colors (red, amber, …
I stand on one leg and have 3 eyes. What am I? Read More »
The Wright Brothers The Wright Brothers, Orville, and Wilbur were two American aviators, inventors, and aviation pioneers of the United States. They are generally credited with inventing and building the world’s first practical airplane and making the first human flight on December 17, 1903. They made the …
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From refraction of the sun’s rays during rain The rainbow is a natural phenomenon consisting of a spectrum of colors. A person standing on Earth sees the sun as a disc with a particular size and shape – a circle. When you look at it from underwater, …
How is a rainbow formed? Read More »
Autumn season is derived from the Latin word “autumnus” which means Autumn (season). It is the Autumn season of the year between summer and winter. The leaves fall off trees at this time of year because of shortening day length and decreasing temperature. …
When do the leaves from trees fall off ? Read More »
To protect passengers in case of an accident Airbags on a car work as shock absorbers; they reduce the damage caused to passengers when in an accident. The airbag consists of a rigid plastic bag connected to an inflating mechanism that includes a compressed gas tank. The …
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Siberia, Russia The coldest temperature recorded in the Northern Hemisphere was −68.0 °C (−90.4 °F) at a Soviet military base on January 31, 1933. The coldest permanently inhabited place is Oymyakon, Russia, where temperatures have been known to reach −71.2 °C (−96.2 °F). It is …
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