General

#961 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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#958 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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#954 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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#952 What are pyramids for?

What are pyramids for? Some pyramids are tombs, some are just monuments, and many are for religious or ceremonial purposes. There are a lot of pyramids, such as the ones in Mexico, that people don’t really know the purpose of. People tend to think that the Great Pyramids in Egypt are the only pyramids that

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#943 How is silk made?

How is silk made? It is made from the cocoon of the silkworm. Silk is a natural material that has been around for over 5 thousand years. Silk was first made by the Yangshao culture in China in the 4th millennium BC. One legend has it that an Empress was drinking tea and a silkworm

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