DK's 1,000 Inventions and Discoveries PDF


ISBN-10: 146542038X

ISBN-13: 9781465420381

From making fireplace to development the contraptions of the twenty first century, discover the tales at the back of the extraordinary rules and units that experience formed our international in 1,000 innovations and Discoveries.

This revised and up-to-date variation brings this accomplished evaluation of humanity's maximum rules modern. strategies in technology, area, know-how, transportation, medication, arithmetic, and language are lined, besides a timeline of heritage highlighting all innovations and discoveries from the airbag to DNA, lie detectors to hormones, and cash to the symptoms of the zodiac. characteristic bins delve into the main points of the lives of Isaac Newton, Marie Curie, Albert Einstein and extra, whereas outstanding photographs and archive fabrics deliver their achievements to life.

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

Supports the typical middle country Standards.

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Additional resources for 1,000 Inventions and Discoveries

Sample text

Shoes c1500 bC T he earliest shoes were sandals, but by about 1500 bc, in Mesopotamia, people were wearing shoes that completely enclosed their feet. They were similar to what we would now call moccasins – single pieces of soft leather drawn up around the ankles with a rawhide thong. At about the same time, the Minoans of Crete were stepping into calflength boots for winter wear. c 1600 bc A scribe in Egypt prepares a new edition of a 1500year-old medical manual. The – 500 bc years before the trumpet really began to develop into the musical instrument that is played today.

Rotary quern c600 bc A fter 3,000 years in which generations of people laboriously ground corn by hand between two stones, an improvement, known as the rotary quern, was developed. It had a heavy, circular top stone that fit snugly into a hole in a stone base. Grain was fed through a hole in the center of the top stone, which was turned around and around with a wooden handle. The two stones crushed the grain between them, Irrigation channel Cobalt blue c650 bc T he deep blue color known as cobalt blue, still widely used on pottery, seems to have been discovered by the Assyrians in about 650 bc.

It was probably used for ritual purposes. The Romans developed trumpets for use in battle, but it was another 1,000 B ody armor was worn in battle until the 17th century, when improved weapons made it useless. It developed little by little – helmets, belts, reinforced shirts – over thousands of years. In about 1100 bc, Chinese soldiers were wearing armor made from layers of rhinoceros hide. By 800 bc, Greek warriors were wearing substantial bronze helmets, metal shin guards, and bronze items called cuirasses, which totally covered their chest.

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1,000 Inventions and Discoveries by DK

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