Science & Mathematics Questions & Answers

As day breaks, a reddish-white ball of light that we call the sun, rises. This red haze gives way to a golden-white sheen as the day advances and reappears when the sun sets in the evening. Does the sun really change colours, or does it only seem so? The explanation lies in-between. Light from the sun consists of three kinds …

Bicycles of many shapes and sizes have led up to the bicycle was know today. The ‘penny-farthing’ bicycle was first seen on the roads of England in 1871. it was invented by James Starley, who later became known as the ‘father of the cycle industry’. It had a large front wheel which varied between 100-150 cm in diameter, and a …

Trade in human slaves began in the earliest times and went on until the nineteenth century. But it was in the sixteenth century, after the discovery of America when the need grew for labour on the new plantations, that the slave trade began to increase. Its center was Africa. Millions of slaves were transported from that continent. The British, French, …

Violet and blue light have short waves and are scattered ten times more than red light waves by atmosphere. While the red light goes almost straight through the atmosphere, blue and violet are scattered by particles in the atmosphere. Thus we see a blue sky.

A large number of people count snakes and spiders among their fears. Now, a new study claims to have unlocked the psychology of the common phobias. Researchers have found that contrary to assumptions that humans possess an evolutionary predisposition to fear the creepy creatures, it is the exposure to negative information about snakes and spiders, which causes phobias. “Previous research …

We should wash our hands before meals as a protection against infections. We live in a world full of germs (micro-organisms or microbes) and those, which are dangerous to us, prefer to live and multiply in organic material. So it is wise to remove as many as possible before coming into contact with food, which provides an ideal breeding ground. …

Scientists may have an explanation for why men may be better drivers than women, and why women have better attention span and memory. A new brain connectivity study from the US published on Tuesday in the peer-reviewed Proceedings of National Academy of Sciences journal found remarkable differences in the neural wiring of men and women that could give evidence for …

A yawn is a very deep breath and the usual cause of it is that we are tired and our breathing has fallen below what it needed, so we are trying to make it up quickly. The yawn that comes when we see someone else yawning though is due to what is called suggestion. One example of suggestion is when …

Yews have long been associated with religious worship. So it is likely that churches were originally built near the sacred trees rather than the other way round. These trees live longer than any other species in Europe and can grow to an enormous size. Many are thought to be well over 1,000 years old. Yews were revered by the druids …

Long ago, no score was indicated on French tennis scorecards by an egg-shaped zero. This was unknown as “L’oeuf’, the French word for egg, and the English-speaking players used the name word, but in this case it sounded like love, and has been called love ever since.