General

#996 How does braille work?

How does braille work? It is a system of writing where you can feel the dots that make up letters and read with your fingers. It is for people who are blind or visually impaired. It is estimated that there are 43 million blind people and a further 295 million people with moderate to severe […]

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#963 How does a telescope work?

How does a telescope work? They used to use lenses, but modern telescopes use mirrors. The first telescopes used lenses in the same way that a camera or a magnifying glass does. The first telescope was made by Hans Lipperhey, a German-Dutch spectacle maker. He used lenses to make glasses and he knew that concave

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#960 Is modern art still modern?

Is modern art still modern? It technically applies to the period that lasted from the 1860s to the 1970s, so modern art is not modern art anymore, if that makes any sense. Postmodern art came after it and right now, we are living in the post-modern contemporary art era. We have an image of modern

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#956 What is a blood diamond?

What is a blood diamond? They are diamonds that are mined in a war zone and used to finance the war. They are called “blood diamonds” because of all the blood that is spilled getting them and all the blood that is spilled from the profits of selling them. They are also called conflict diamonds.

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