The Big Book of Why - download pdf or read online

By BBC Focus

The large ebook of Why
Brand-new particular version from BBC concentration – the massive ebook Of Why?

Aimed at curious readers elderly anyplace among nine and ninety, the large publication Of Why? solves a variety of clinical questions and conundrums approximately how existence works. With solutions supplied by way of the crack group of specialists at the back of BBC concentration, each web page deals enlightenment and revelation. Why can we have knowledge tooth? Why do tigers have stripes? And why is it more secure to take a seat backwards on a plane?

Also, a distinct the way it Works part finds the state of the art pondering and engineering at the back of the most recent expertise – from formulation E racing autos to robotic exoskeletons.

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All substances have a refractive index, which refers to the speed at which light travels through them compared to through a vacuum. When we’re underwater, the refractive index of the water is too similar to that of our corneas. This means we can’t focus as well and our lenses can’t adjust enough to make up the difference. Therefore, our vision is blurry underwater unless we wear goggles. Goggles solve the problem because they introduce a pocket of air between the water and our eyes. Penguins need to be able to see clearly both on land and in water.

Incisions can be smaller than in conventional surgery and there is less bleeding, reducing recovery times in 64 THE BIG BOOK OF WHY? prostate operations from six to two weeks. When a surgeon moves their hand, the instrument tip only moves a fraction of that distance, allowing more precise movements – as little as 1mm for every 3mm moved by the surgeon’s hand. The doctor also uses a 3D vision system, along with a camera inside the patient, so that the procedure can be viewed in minute detail. TECHNOLOGY What is the biggest object to be 3D printed?

This may be because fruit flavours don’t hang around for long – the Copenhagen breastmilk study found that noncitrus fruit flavours only affected the milk for a few hours. Diet definitely affects the flavour of the milk of all mammals. A 2008 study at Copenhagen University gave flavour capsules to nursing mothers and found that the taste made its way into their breastmilk within minutes. Elsewhere, dairy farmers have long known that weeds in the pasture can taint the taste of cow’s milk. In fact, it’s been said that French Gruyère de Comté cheese even tastes different when it is made from the milk of cows fed on mountain grass, rather than in the valley pastures.

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The Big Book of Why by BBC Focus

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