What makes the sound when we crack our knuckles?
Reading Time: < 1 minuteCracking knuckles can be addictive and studies show that as many as 54 percent of people crack their knuckles. What drives them to crack their knuckle with a “popping” sound? The synovial fluid in our joints serves a similar function as motor oil in a car’s engine, by lubricating our joints as well as reducing […]
Why do snakes flick their tongue?
Reading Time: < 1 minuteDo you feel frightened when snakes flick their tongue? Although it is frightening, it is a natural behaviour for snakes to flick their tongue. Snakes flick their tongue to gather information from their surroundings to deliver to their sensory organ in their mouth. Snakes do have nostrils as humans do, however, snakes use their nostrils […]
Palm oil: More than just cooking oil!
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What is Attention Deficit Hyperactivity Disorder (ADHD)?
Reading Time: < 1 minuteADHD is one of the most common neurodevelopmental disorders of childhood. It is usually first diagnosed in childhood and often lasts into adulthood. This disorder affects about 6% – 9% of children. However, about 60% of those children continue to have these symptoms as adults. Symptoms of ADHD tend to be noticed at an early age and may […]
How fast a flea can accelerate?
Reading Time: < 1 minuteFLEAS are reddish-brown tiny parasites that live on the exterior of the host. Fleas are blood-sucking insects being carriers of disease and could be serious pests. Fleas do not have wings but have flat bodies and strong legs, which allows them to jump long distances by using their hind legs to propel them. They travel […]
How does crying cause you to have a runny nose?
Reading Time: < 1 minuteEVERYONE has experienced it. You cried when you are sad and tears fell down your cheeks. But cry a little longer and you would have a runny nose too. This runny nose is not mucus, but it actually is tears that came from your eyes! So how does a tear get to your nose? Tears […]
Why does sound move faster in water than air?
Reading Time: < 1 minuteWe know that sound does not travel in outer space because the vacuum environment has no particles to carry the sound wave. This is because sound travels by particles bumping into each other as they vibrate. Therefore, sound can travel through solid, liquid, and gas. Sound waves travel four times faster in water than in the […]
How do penguins survive in saltwater?
Reading Time: < 1 minutePENGUINS are flightless marine birds that live below the equator. Though they are birds, penguins have flippers instead of wings. They cannot fly and on land, they waddle walking upright, though when snow conditions are right, they will slide on their bellies. They are known as expert swimmers and divers in the water. Many penguins […]
How long does it take for a red blood cell to circulate through the body?
Reading Time: < 1 minuteRED blood cells are an important component of the human circulatory system. The red blood cells are produced in the bone marrow. Your body has about 5.6 litres of blood. Red blood cells transport fresh oxygen throughout the body and eliminate carbon dioxide from your body. In addition, red blood cells also take nutrients, proteins […]
What colour do you see when you close your eyes?
Reading Time: < 1 minuteTRY to close your eyes and what do you see? You might say it’s dark and can’t see anything. But do you know that even when we close our eyelids, our brain and eyes are still working? That is the reason why we see splashed or swirling light when we close our eyes for a […]