You'll never guess how your body fights germs or how dinosaurs fought each other, what kind of animal is named after Sir David Attenborough and what sunsets look like on Mars. All is revealed in this delightful collection of four books. A brilliant addition to any family bookshop, the Big Book of Things to Know contains amazing facts from Lots of things to know about Your Body, Space, Animals and Dinosaurs in a single volume bursting with vibrant illustrations and packed with quirky and surprising things to know. Clear, approachable text will spark young readers' curiosity and is perfect for fact-hungry children to share with family or impress their friends with. Chapters in this book include:Your Body- Take a deep breath- Why do you have a belly button?- Babies are WEIRDER than you think... - You'll never guess how much you'll eat- Inside your tummy... - Which muscle is your strongest?- Excuse me!- How much time you'll spend on the toilet- All different shapes and sizes- One-of-a-kind prints- You're electric!- Your tongue only knows five tastes- Why Brussels sprouts are yucky- Your height changes even when you're fully grown- Space travel makes you taller- Why your blood is red- Ba-bump, ba-bump, ba-bump... - Every body needs help with something- Vital organs?- Ahh-choooooooo!- A LOT of snot- Drink up!- You couldn't live without... - Bodies worth MILLIONS!- You'll never guess who's hairier- Around and around the world... - Which is more tiring, standing or walking?- You're a lot like everyone else... - ...and you're quite like a banana- Remember, remember... - How your ears help you balance- Long ago hairdressers cut more than hair- How long a beard can grow- What's eating your lunch- Rumbling tummies- Your bones are alive- Funny bones- What's that smell?- What's the time?- OUCH!- Your brain can't hurt- Have a laugh- The tiniest things can hurt your body the most- How your body fights germs- You're about to yawn... - While you're dreamingSpace- The Sun is a star- If aliens sent us a postcard... - Numbering the stars- How stars glow- Not all astronauts were human... - How rain falls on other planets- There's a snowman in space- Dirty snowballs with long tails- Snowball fireworks- A story of looking and learning- When is a planet not a planet?- Going up!- It's oh so quiet up here... - Everyday life in outer space- How to use a space toilet- From another star system far, far away... - Don't take a spaceship to Jupiter- The planets that are mushy on the inside- Baby stars make baby planets... - ...and baby stars eat baby planets- Who did it first?- What a mess!- Swerve!- How many people does it take to land on the Moon?- Keeping space germ-free- The universe awards- The Sun's light is a wavy rainbow- Sunsets on Mars- There's a travel network in our solar system... - Planet hunters- Ocean worlds- The secret behind a moon's wobble- Robot space adventurers- How to garden on the Moon- Measuring the universe- Light-distant chatting- Moon trees- Colds are even worse in space- Set sail for the stars!- Our galaxy is bubbly- Telescope time machine- When a star stops shining... - When a star becomes a hole... - Space wordsAnimals- Ocean giants- The baby animal that's LARGER than its parents- How to spot a leopard... ...from a jaguar- Why horses dress up like zebras- Octopuses in disguise- How tiny ants are actually STRONGER than gorillas- How creatures go? HIGH can birds and bumblebees fly?- The secret of hornbills' nests- The great shell swap- Noisy animals you CAN'T hear- The cave of bats that's busier than New York- You'll hardly BELIEVE your eyes!- Which live LONGEST?- Animals from dinosaur times- Why whales blow bubbles- How do prairie dogs say hello?- Why sloths turn green in the rain- What makes flamingos pinkDinosaurs- Long, long, long, long, long, LONG ago- Dinosaur times- What dinosaurs ACTUALLY looked like- Dinosaurs the size of rabbits- What's the point of a dinosaur's tail?- How to tell what dinosaurs ate- Dinosaurs in shining armour- The largest creatures ever to walk on Earth- The island of Tyrannosaurus rex- The secret sounds of dinosaurs- From CHICKEN IMPERSONATOR to WRINKLE FACE- In the footsteps of dinosaurs- A trip to the dinosaur dentist- How ring-shaped nests kept dinosaur eggs safe- See inside dinosaur eggs