Can Cows Walk Down Stairs?: Perplexing Questions Answered

Can Cows Walk Down Stairs?: Perplexing Questions Answered

Language: English

Pages: 288

ISBN: 0750937483

Format: PDF / Kindle (mobi) / ePub

Can Cows Walk Down Stairs?: Perplexing Questions Answered

Language: English

Pages: 288

ISBN: 0750937483

Format: PDF / Kindle (mobi) / ePub


What is ear wax for? Do bacteria have sex? How do they put stripes in toothpaste? Does your nose run in space? What are stars made of? This book answers those tantalising or perplexing questions for which you thought you'd never find an answer. A book for the naturally curious, as well as those seekers after scientific truths, it unravels both those things we take for granted, such as, when you boil an egg, why does the yolk stay in the middle, or why is the sky blue, as well as questions which probe deeply, such as, what does an atom look like, or what was there before the beginning of time? If you were to write in the dust on the moon, how big would the letters have to be so you could see them from earth without a telescope? Drawing on the expertise of a team of enthusiastic scientists around the world, authoritative, entertaining, and often a touch humorous, it will appeal to anyone who's ever been curious about life on earth.

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Feeling? Curries, Sherbet and Falling in Love 9. Number Crunching Starting at Zero 10. Can You Just Explain … ? 11. Brainstorms From Grey Matter to Bread Crusts Copyright Introduction The French philosopher and anthropologist Claude Lévi-Strauss (not the inventor of denim jeans), whose complex theories of structuralism are as far removed from my understanding as the small print of an insurance policy, once said, ‘The scientific mind does not so much provide the right answers as ask

almost anything, but they too will vomit readily if they eat noxious things. But we poor humans are far less well equipped than our pets, so we cook meat because we prefer it that way and it’s less dangerous for us to eat. 3 Birds, Bees and Creepy Crawlies Sneezing Birds and Spiders’ Webs Why don’t birds bump into one another when they’re flying? They would if they didn’t have such fantastic reaction times. Think about children playing netball. Each player is supposed to mark

No, glass is not a liquid: it is as solid as any other solid. Try hitting yourself over the head with a glass bottle and you will find it to be extremely solid! However, what they may be getting at is the fact that glass is what is known as a super-cooled liquid. For all solid elements, and many solid compounds and mixtures, heating causes them to melt, and this melting occurs at a very well-defined temperature. Just a fraction of a degree below the melting temperature and the material is solid

conditions these rough surfaces can’t move much against one another, but if immersed in warm water then the scales on the fibres can ride over one another. But when the wool dries they can’t get back again – your sweater has then shrunk and the wool has become matted because the surfaces have locked together. Wool is funny stuff. The outside of wool hates water and repels it (hydrophobic), but the inside of a wool fibre is hollow and absorbs water (hydrophilic). If you wet a wool sweater, it

electrostatic forces called ionic bonds. Ionic bonds involve one ion giving an electron to another and these bonds aren’t as strong as covalent bonds. This makes the diamond the winner in the strength stakes. Is there anything harder than diamond? Diamond is still the hardest substance known to science, but a group of American researchers say that they have produced a composite material which contains crystals of carbon nitride, a substance which scientists believe stands a good chance of

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