Bringing real snowflakes inside one at a time is next to impossible. Here is a solution with chemistry! You can mix borax in water, and dip the stuff made of wood or plastic inside it. These snowflakes won’t melt. So decorate your Christmas tree with Borax Crystal Snowflakes and enjoy the coming party season.
When the silence of night comes to the “Nocturnal Hunters” they have to be extra careful at hunting. Owls are terrific at this because they can fly without making any noise. That’s because of the serrations on the edges of their feathers. It can absorb large sound waves by breaking them in to small ones. This has been a major inspiration of making aircrafts with low noise. And here we are following nature trails again!
Do you know that there are trains without wheels and engines? Then how do they work? They run on magnetic levitation and are known as “Maglev” in common. These high-speed rail networks use magnets to lift the train above the tracks to travel faster and more quietly.
Have you ever seen a snake sleeping? Most obviously the answer would be “NO”. Because they sleep with open eyes. The reason is they don’t have eye lids so they don’t even blink. Their each eye is covered with a single clear eye scale. These eye scales protect eyes from injury and prevent the eyes from drying out.
When we stand on Earth blood feels gravity and pools in the feet. As such blood pressure in feet is much higher than in brain. But when human body enters space due to microgravity, the body fluid collect in higher areas like face, than the usual amount making them look puffy. Higher blood pressure in head raises an alarm: The body has too much fluid! This errant message drives away thirst, triggers diuresis resulting in fluid loss.
When astronauts return from long space travels most of them look odd with puffed faces filled with fluid. But when considering the overall body fluid level, it shows a drop of about 22 percent from the initial level. Explain the reason behind these.
We all know that cats purr as a habit. But why? It’s not just they are happy and want to show friendliness. Have you noticed that your cat doesn’t purr in the same frequency? The tone differs from time to time and the purpose differs accordingly. Purring at 26 Hertz promotes tissue regeneration and help them to heal their wounds soon.
One of the questions you might have been idly wondering as you sat through your most recent flight is why are aeroplane windows always round and not square shaped? Square windows have edges, and when one is flying at high speeds, the stress is very high for edges. A round window has no such stress point and can bear the immense difference in pressure inside and outside the plane.
Why did pirates wear eye patches? Not because they wanted to cover a missing eye. Then why? That was to adjust the covered eye for ‘dark vision’. It takes a human eye about 25 minutes to fully adapt from bright sunlight to seeing in complete darkness. When pirates have to go below deck they could swap over the eye patch from one eye to the other and see with the eye that has already adjusted to low light conditions.
Why cracker biscuits have holes? They are not just for decoration. These holes stop overly large air pockets from forming in the cracker while baking. They keep the cracker flat instead of rising like a normal biscuit allowing steam to escape during cooking. This helps to give it the actual crispy taste of a cracker.
Do you know that we can’t hear sounds in space because there isn’t enough air in space, and what we call “sound” is actually vibrations in the air? Then how can the astronauts communicate with each other? They have devices in their helmets which transfer the sound waves from their voices into radio waves and transmit it to other astronauts in space. Since radio waves are a form of electromagnetic radiation they can propagate through a vacuum.
Did you know that a 600 pound (272kg) adult octopus can squeeze through a hole the size of a 10 cent coin? Since octopuses have no bones at all, they are able to fit in extremely small spaces. No matter how many yoga lessons human takes he’ll never be this flexible because we humans have bones.
Sudden exposure to cold will trigger the sympathetic nervous system and also helps to lower body temperature. The rush of adrenaline in the body will increase heart rate and will make the person awake. Rate of metabolism will also increase to revise body temperature and drives away drowsiness.
Throwing a bucket of cold water on a sleeping friend isn’t just a great prank, it actually helps to wake them up and drives away drowsiness. But how does this happen?
When we cook fish, most of the time the bad fishy smell is left in our hands making it very unpleasant. Did you know that you can get rid of that odor by rubbing your hands across a stainless steel spoon? Sulfur from fish binds with metals and make our hands free. Even stainless steel soaps are being prepared using this concept.