Ten scientific trivia

Why do cicadas shed their skin? The shell (exoskeleton) of cicadas is hard and cannot expand as cicadas grow. When exoskeleton is removed, this is peeling of cicada. (Image from Dongfang IC)

The real name of Four Different Elephants is elk, a rare animal in my country (photo from Dongfang IC)

Why does sorbet smoke? Sorbet smokes because there is a lot of invisible water vapor in outside air. Upon encountering a very cold sorbet, it turns into a mist and surrounds sorbet when it is cold. The sorbet seems to be "gassing" (photo from Dongfang IC)

How do bees make honey? The bees first spit sweet juice from collected flowers into empty hive, at night they suck sweet juice into their honey stomach to cook it, then they spit it out and swallow it again ~240 times, and finally it turns into sweet honey. (Image from Dongfang IC)

Why can snakes walk without legs? Snakes have many scales, which are outer layer of armor on their bodies. The scales are used not only to protect body, but also their "legs". As snake crawls forward, its body takes on an S-shape. Each scale outside of S-shape will be raised to help snake grip rough road as it moves forward. These scales interact with snake's muscles and can push body forward to crawl, so snake can walk without legs! (Image from Dongfang IC)

Why do fireflies glow? Fireflies will glow because they have a light emitter at end of their abdomen, filled with a variety of phosphoric luminescent substances and luminescent enzymes, so that fireflies can emit flashes of light. The purpose of light of fireflies is not only for illumination, but also for courtship, warning, trapping and other purposes. It is also a tool for their communication. Different types of fireflies have different methods of emitting light, frequencies and colors of emitting light, and they use this to convey different messages. (Image from Dongfang IC)

Why can't an ostrich fly? Like an ostrich with a huge body, but they can't fly into sky! It's not that their wings don't work, it's that their feathers are too soft and their wings are too small to fly. In addition, ostrich has underdeveloped muscles and a flat sternum, which is not conducive to flight. Ostriches live in Africa. Since they lived in desert areas for a long time, their bodies gradually evolved into what they are today to adapt to environment. (Image from Dongfang IC)

Why is sea water mostly blue and green? When I look at sea, I often find that sea water is blue and green. However, when you scoop up sea water, all you see is that it is as clear and colorless as water was in past. It turns out that sea water itself is not much different from water that we come into contact with every day, and it is also transparent. The green color we see is actually a phenomenon caused by ability of seawater to absorb light. Only green light can be absorbed by seawater and reflected; when sea water is deeper, green light is also absorbed and sea water looks blue. (Image from Dongfang IC)

When a quartz clock hanging on wall stops moving due to a low battery, its second hand will often stop at 9 position on dial. This is due to fact that second hand slows down gravitational moment most at position "9". (Image from Dongfang IC)

The mirror is out of shape: farther you are from mirror, more you lose shape. Since image in a mirror is formed by reflection from silver plated surface behind mirror, uneven silver plated surface or uneven glass thickness causes aliasing. For a non-standard mirror, farther a person is from mirror, greater deviation from normal position of reflected light on silver-plated surface, due to principle of light amplification, and greater deviation from normal position. -The shape of mirror will be. (Image from Dongfang IC)