It is a well-known strange fact that owls can see well in a dark night too. Actually, in an owl’s eyes, there are two types of cells, called ‘rod cells’ and ‘cone cells’. Cone cells help perceive colours and rod cells give the visibility factor. Rod cells in an owl’s eyes are 10 times more […]
The ocean contains salty water and behind such saltiness there are a few reasons. Firstly, rain when falls on earth contains the dissolved form of carbon-dioxide which causes rainwater to be acidic in nature and also contains carbonic acid. The rain when erodes the rock, the acid present in it, breaks down rocks chemically and
Any object floats or drowns in water because of its density. Actually at the depth of any liquid, there is an upward force because of the effect of gravity on fluid. If an object falls on it, having less density than the density of fluid, it will float. If the object has higher density than
Sleeping is a process of recurring once state of mind and tiredness that keep the human body active. Logically, time is set such that it is worked according to the cincadian clock and also people prefer sleeping as night is taken for granted to be the time for sleeping. Night is meant for sleeping because
Mosquitoes are famous for distributing diseases like malaria, etc to human beings but you will be really surprised to know that mosquitoes cannot spread AIDS virus (HIV). Actually, AIDS is spread by unsafe sexual relationships, by injecting HIV affected blood to the body or by injecting infected injections. No doubt, mosquitoes also suck our blood
Firstly, the moon is not a light source. So it cannot produce its own light. It shines just because of the sun. Actually, at daytime the sun heats the moon and some amount of light is radiated by the moon in daytime. But such radiation is of very low intensity in comparison to light radiated
Menstruation is a common process of 28 days of discharge of blood, tissue from the uterus cells of a woman’s body. Peculiar methods occur periodically in a woman’s life and, hence, she needs it because it is a life-long process only interrupted by the pregnancy of a woman. It is needed because it is a
It is generally known by laymen that a lemon is acidic in nature but you might feel confused if you come to know that lemons have citric acid in them but water with a lemon has alkalizing effect on the body. Lemons have high pH value which may vary between 2.2 to 2.4 depending upon
Long ago, there was a family of a man, his wife and their daughter. Sadly, all three of them were deaf. One evening, the man took his donkey down to the river to get him to drink some water. There were many herdsmen who had brought their cattle to drink water. One of the herdsmen
Snow falls from the sky, but where exactly does it come from? Snow begins in the atmosphere as water condenses into a tiny droplet. As more and more water vapour condenses onto its surface, the droplet grows. Cold air then freezes this water into an ice crystal. Each ice crystal has a unique shape that
The sky appears as blue only when the sunlight enters the atmosphere. The sunlight is made up of a spectrum of colours, known as VIBGYOR or rainbow colours. As soon as the light enters the atmosphere, the colours all scatter as they pass from different particles in the air. The colour in the light with
Why is the Sky Blue during Daytime and Black at Night? Read More »
The earth is round because of the force called gravity. Most of you must be thinking about how the force is affecting the planet to be round. The gravitational force on the earth which binds objects and brings the ball back when thrown in air is one of the conventional forces that make the earth
On the earth, we have light due to the sun. The layer of gases that surround the earth causes light to reflect and refract. Space is a vacuum where there is no gas, solid or liquid particle that may cause the light to deflect in the surroundings giving an illumination just like we observe from
Long ago, a man asked one of his sons to build a house for them to live in. When the son went out to work, he met a rat on the way. The rat said, “Let’s play, tell stories, chat and have fun.” The son said that his father had told him to build a
Galaxy is a group of stars, large dark matter and dust bounded together by the gravity. The Milky Way is a bar-shaped spiral galaxy whose diameter is 100,000-120,000 light years. It contains 200-400 billion stars. It appears like a band of light from the earth at night time. There are three major components of Milky