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Why should we wash our hands before meals?

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. …

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Why men are better navigators, and women have better memory

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 …

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Why is there usually a yew in many old churchyards?

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 …

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Why is the shuttle like a saucer?

You could say because they are both spacecraft. However, the right answer is that they are both made of ceramics. Saucers are made of ceramic material called porcelain, and the space shuttle is covered with ceramic tiles that resist the intense heat of re-entry into the Earth’s atmosphere. Ceramics are materials like pottery. They are made of substances such as …

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