Download 1,000 Inventions and Discoveries by DK PDF

By DK

ISBN-10: 146542038X

ISBN-13: 9781465420381

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

This revised and up to date variation brings this complete evaluation of humanity's maximum principles brand new. options in technology, area, expertise, transportation, drugs, 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 funds 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 remarkable 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 kingdom Standards.

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Extra resources for 1,000 Inventions and Discoveries

Example text

He only experimented with strings and never thought about music made with more than one instrument. secretive philosopher This bust portrays Pythagoras as a great mathematician and philosopher, but neither he nor most of his followers published their work. 38 wo and a half thousand years ago, a small town in Italy was home to an extraordinary group of thinkers. They discovered facts about music and mathematics that we still use today, but more important, they came to believe that the world around us is based on mathematical rules The Greek philosopher Pythagoras was about 50 years old when he crossed the Ionian Sea to settle in Crotona (now Crotone) and gather his students around him.

Only two, which deal with the origin and growth of plants, have survived. Modern botanists no longer use his work, but without him they might never have gotten started. Theophrastus fter thousands of years spent using and cultivating plants, people began to wonder where the plants came from and how they worked. The scientific study of plants is called botany, and the ancient c 300 bc Geographer Pytheas becomes the first Greek to describe northern Europe after 46 C tesibius of Alexandria discovered that air can be compressed and will then exert a force.

It was a common custom to place models of boats in the tombs of kings and nobles, for their transportation in the afterlife. houses, constructed from rough stone blocks, are circular in shape and rise to a point in the centre like a straw beehive. c 2000 bc The world’s first written language, Sumerian, ceases to be spoken because the Sumerians, now the Akkadians, switch to the language of their conquerors. Sumerian will live on in written form for 2,000 years. c wood. Its angled teeth cut in easy stages and create a gap wide enough for the blade to pass right through.

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