Download e-book for kindle: 1,000 Inventions and Discoveries by DK

Download e-book for kindle: 1,000 Inventions and Discoveries by DK

By DK

ISBN-10: 146542038X

ISBN-13: 9781465420381

From making hearth to development the devices of the twenty first century, discover the tales in the back of the extraordinary principles and units that experience formed our international in 1,000 innovations and Discoveries.

This revised and up-to-date variation brings this complete overview of humanity's maximum principles modern. techniques in technological know-how, house, know-how, transportation, medication, arithmetic, and language are coated, in addition to a timeline of heritage highlighting all innovations and discoveries from the airbag to DNA, lie detectors to hormones, and cash to the indicators of the zodiac. characteristic packing containers delve into the main points of the lives of Isaac Newton, Marie Curie, Albert Einstein and extra, whereas extraordinary photographs and archive fabrics carry their achievements to life.

Covering over three million years of rules, 1,000 innovations and Discoveries will amaze and encourage a love of historical past in kids.

Supports the typical middle nation Standards.

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It survived until after 1100, when invaders from Turkey destroyed it. Coded correspondence c410 bc T he first secret messages were exchanged by the Spartan army chiefs of ancient Greece, using a tapered rod called a scytale. They wound a strip of leather around the rod, then wrote on the leather. When unwrapped, the strip displayed a meaningless jumble, but catapult The catapult was still used as a weapon in the Middle Ages. It was useful if there was time to get it into place and the target was easy to hit.

C450 bc H orses are not well suited to hot, dry climates. Donkeys are better suited, but are often too small and slow. We don’t know who came up with the idea of crossing Knitted socks c450 bc A SignS of the zodiac This 16th-century woodcut gives one of many theories that developed linking the zodiac with the body. fter enduring scratchy felt socks for centuries, feet finally got some loving care in the shape of knitted socks. Throwing arm has a cup at the end to hold the missile Skein of twisted sinews provides pulling power Flying actor c450 bc Sophocles W hen an ancient Greek playwright got into an impossible tangle with a plot, the usual way out was to have a god descend from heaven and fix the mess.

Rope to winch down the arm Heavy base to keep the catapult on the ground c 430 bc 499 high, it shows Zeus on a throne encrusted with gold and precious stones. It becomes one of the Seven Wonders of the World. 390 bc The Gauls, a Celtic race living in what is now northern Italy and France, sweep down the Improved Babylonian calendar c380 bc T he early Babylonian calendar started a new month with every new moon (✷ see page 21). To keep it in step with the seasons, extra months had to be added now and then.

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1,000 Inventions and Discoveries by DK


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