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The invention of the wheel, one of the greatest inventions ever, caused a revolution in transport. In most places of the world, it replaced men and animals (goods and people carried on their back) used for transport. However, 2000 years ago, in the Middle East a reverse situation happened: camels replaced wheel-based (animal) transport. The author explains how it was simple economics that made the camel supplant the wheel then.


This one is a story of book thieves in London. Among other things, it talks about how thieves would steal books – big and small; what kind of books they stole; and what time would they steal these books. More interesting is the part about the thieves themselves.