Machine generated contents note: Are there any undiscovered animals? / Sir David Attenborough -- Is it OK to eat a worm? / Bear Grylls -- What are atoms? / Marcus Chown -- Why are the grown-ups in charge? / Miranda Hart -- Why is blood red, not blue? / Dr Christian Jessen -- How are dreams made? / Alain de Botton -- How long would it take to walk around the world? / Rosie Swale-Pope -- Why do we have music? / Jarvis Cocker -- Do aliens exist? / Dr Seth Shostak -- Where does wind come from? / Rob Penn -- Why do we speak English? / Professor David Crystal -- Why did dinosaurs go extinct and not other animals? / Dr Richard Fortey -- Why do cakes taste so nice? / Lorraine Pascale -- How do plants and trees grow from a small seed? / Alys Fowler -- Why do monkeys like bananas? / Daniel Simmonds -- Is the human brain the most powerful thing on earth? / Derren Brown -- What is global warming? / Dr Maggie Aderin-Pocock -- Why do I get hiccups? / Harry Hill --
Contents note continued: Why is space so sparkly? / Martin Rees -- Why can't animals talk like us? / Noam Chomsky -- How do story writers get ideas for characters? / Dame Jacqueline Wilson -- How do cars work? / David Rooney -- Why can't I tickle myself? / David Eagleman -- Who had the first pet? / Celia Haddon -- Why are planets round? / Professor Chris Riley -- Can a bee sting a bee? / Dr George McGavin -- Why do we cook food? / Heston Blumenthal -- How do you keep going when you're losing in sport? / Dame Kelly Holmes -- Why do wars happen? / Alex Crawford -- Why do we go to the toilet? / Adam Hart-Davis -- Why do lions roar? / Kate Humble -- Why do we have money? / Robert Peston -- Who wrote the first book ever? / Professor Martyn Lyons -- Why do elephants have trunks? / Michaela Strachan -- Why are some people mean? / Dr Oliver James -- How do trees make the air that we breathe? / Dr David Bellamy --
Contents note continued: If the universe started from nothing, how did it become something? / Dr Simon Singh -- Why do people have different-coloured skin? / Carl Zimmer -- Will the North and South Poles ever melt completely? / Dr Gabrielle Walker -- Where does ̀good' come from? / A. C. Grayling -- Why is the Sun so hot? / Dr Lucie Green -- What is the most endangered animal in the world? / Mark Carwardine -- Why do girls have babies and boys don't? / Dr Sarah Jarvis -- In Victorian times why did kids do all the work? / Claire Tomalin -- What is gravity, and why isn't there any in space? / Dr Nicholas J. M. Patrick -- Why can't we live forever? / Richard Holloway -- How does water get into the clouds so it can rain? / Gavin Pretor-Pinney -- Why do animals that fly have feathers, not including bats? / John ̀Jack' Horner -- How does my brain control me? / Baroness Susan Greenfield -- How do chefs get ideas for recipes? / Gordon Ramsay -- Are we all related? / Dr Richard Dawkins --
Contents note continued: How do they know all snowflakes are different? / Justin Pollard -- Why does time go slowly when you want it to go fast? / Claudia Hammond -- Who first made metal things? / Neil Oliver -- How do the bubbles get into fizzy drinks? / Steve Mould -- Why is the sky blue? / Simon Ings -- How do sportspeople concentrate when the crowd is noisy? / Colin Montgomerie -- Do monkeys and chickens have anything in common? / Dr Yan Wong -- How did we first learn to write? / John Man -- Why do scientists look at germs, and why can't I see them? / Joanne Manaster -- Do any people eat polar bears or lions? / Benedict Allen -- Why does the Moon change shape? / Chris Riley -- Do numbers go on forever? / Marcus du Sautoy -- Where did the first seed come from? / Dr Karen James -- Why was Guy Fawkes so naughty? / Philippa Gregory -- What do you have to do to get into the Olympic Games? / Jessica Ennis -- Who was the first artist? / Michael Wood --
Contents note continued: What am I made of? / Lawrence Krauss -- Why do penguins live at the South Pole but not the North? / Vanessa Berlowitz -- How does an aeroplane fly? / David Rooney -- What's the strongest animal? / Steve Leonard -- Who named all the cities? / Mark Forsyth -- Why is water wet? / Roger Highfield -- What would I look like if I didn't have a skeleton? / Joy S. Gaylinn Reidenberg -- Are cows polluting the air? / Tim Smit -- How do writers think of their ideas? / Philip Pullman -- Who invented chocolate? / Joanne Harris -- Why do men grow beards and not women? / Dr Christian Jessen -- Is sugar bad for you? / Annabel Karmel -- How did they build the pyramids in Egypt? / Dr Joyce Tyldesley -- Why is the sky dark at night? / Christopher Potter -- What should you do when you can't think what to draw or paint? / Tracey Emin -- How do you make electricity? / Jim Al-Khalili -- Did Alexander the Great like frogs? / Bettany Hughes --
Contents note continued: What are our bones made of? / Alice Roberts -- If you're on a boat with no food or water, what do you do? / Roz Savage -- How does my cat always find her way home? / Dr Rupert Sheldrake -- What's inside the world? / Iain Stewart -- Who is God? / Julian Baggini -- Meg Rosoff -- Francis Spufford -- How many different types of beetle are there in the whole world? / Dr George McGavin -- How far away is space? / Marcus Chown -- How does lightning happen? / Kathy Sykes -- Why are some people taller than others? / Katie Woodard -- Why is wee yellow? / Sally Magnusson -- What was the biggest battle the Romans fought in? / Gary Smailes -- Why do I get bored? / Peter Toohey -- Are there really monsters living in our mouths called blackteria? / Liz Bonnin -- Why do we sleep at night? / Russell G. Foster -- Will we ever be able to go back in time? / Dr John Gribbin -- How does fire get on fire? / Dr Bunhead --
Contents note continued: Why do we have lots of countries, not just one big country? / Dan Snow
What makes me me? / Chris Stringer
If a cow didn't fart for a whole year and then did one big fart, would it fly into space? / Mary Roach
Why is the sea salty? / Mark Kurlansky
What is the internet for? / Clay Shirky
How did Michelangelo get so famous? / Sister Wendy Beckett
How do you fall in love? / Jeanette Winterson
If my stomach was unravelled how long would it be? / Dr Michael Mosley
Why do we have an alphabet? / John Man
Why do I always fight with my brother and sister? / Tanya Byron
What are rainbows made of? / Rob Penn
When did people start using recipes? / Mario Batali
Why does the Moon shine? / Dr Heather Couper
Where do the oceans come from? / Dr Gabrielle Walker
Why do snails have shells but slugs don't? / Nick Baker
