Fruits do change their colours as they ripe to attract eaters and animals. Unripe fruits such as a green banana are bitter, raw and hard to chew where as the yellow ripened banana is tasty and sweet. Fruits change colours when their seeds are ready to be transported. Bright colours attract animals to eat fruits […]
Why does a Fruit Change its Colour as it Ripens? Read More »
Against the popular notion that the strong odour of the onion makes us shed tears but in reality, it is the gas released by an onion. An onion contains oils that have sulphur, which irritates not only our eyes but also our nose. When we cut an onion the gas from it known as propanethiol
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Coffee contains caffeine, which helps us reduce drowsiness. Sleepiness or drowsiness is often chemically induced by adenosine that binds to its receptors in the brain and creates drowsiness. Caffeine is a chemical and it alters the chemical level of our brain making us feel aroused. Firstly, it stimulates up by rushing adrenaline in our blood
Different types of clouds can be largely seen in the sky due to the air pressure and the temperature of the sky. When the air is cold way up in the sky, the water droplets from which the clouds are formed condense and freeze. On the other hand, warm air makes these clouds to come
We perspire mainly to keep the body temperature at the level of 98.6 degrees Fahrenheit. The temperature of the human body is controlled by brain, which is the temperature control centre of the body. Since our body needs to burn around 2500 calories to run its basic internal mechanism each day, the releasing of energy
Electricity is a force, which is generated outside our body. If it comes in contact with the human body it may disturb the internal current or electricity in our body that the nervous system generates. The human body has a high volume of water content and, therefore, is a good transmitter of electricity. If the
Once upon a time, the King of Uganda wanted to make a Zoo. He called all his ministers and ordered them to bring different kinds of animals from the forests and swamps. Then, in a beautiful garden he kept the animals in the cages. People from all over the country came to see them. But,
Dream is what we experience, see, and feel during sleep. But why is it caused? Whether it has some purpose or not, is not fully answered by anyone yet. At present, there are two groups who explain the answer to such questions as per their own perspective. But in some points, both are the same
Eyelid which blinks is one of the involuntary movements in the human body. The action of blinking essentially keeps the eye moist and protects it from any foreign matter. The fold of skin, which forms the eyelid also, has sebaceous glands underneath it, which secrete oils to keep our eyes away from drying. The rapid
In reality, only we on the earth observe stars twinkling and shining. The perception of stars twinkling is mainly because the earth has a lot of layers in the surrounding atmosphere with distinct air density and temperature. Due to this, the light that is reflected on the surface of the earth (from where we observe)
Sometimes you may have noticed irregular bare spots in your gardens and odd crop growth. At that time, you might have thought that you have taken care of everything even then why it is so. Actually, it is so because of salty soils which are caused by poor drainage, deicing salts, excessive use of fertilizers
Hair is primarily made up of protein, called keratin and grows from a follicle, which is a sac. Proteins have sulphur atoms and when two sulphur atoms combine they form a disulphide bond. The texture of our hair mainly depends on the disulphide bond. The greater the number of these bonds, the curlier our hair
Burping or belching is a way out for gases that have caused indigestion in the stomach. The release of gas is via the oesophagus from the stomach, which comes out of the mouth. This regurgitation is because the air we take in while we eat and drink that causes tension in the stomach and that
Human body-parts do not fall asleep as the prescribed notion but they tend to lose the sensation of touch or pressure due to the compression of the nerves, which takes the stimulus from the body to the brain. Mostly, it is because of the position of our limb that defines the sleepiness of our body-part.
Leaves change colours when the season changes. In the fall or winter, the leave pigment responsible for the green colour, chlorophyll is not produced in leaves. Here, the secondary pigments act and give their colours to leaves. These include carotene, which gives bright orange colour to carrots. Anthrocyanin in red and wine-coloured leaves gives colour