What happens in your head during a headache? What are toes for? Why are some farts eggier than others? Glenn Murphy, author of Why is Snot Green?, answers these and a lot of other brilliant questions in this funny and informative book.

Packed with doodles and information about all sorts of incredible things, from scabs, cells and broken bones to brainpower, bacteria and deadly diseases, this book contains absolutely no boring bits!

This book is part of a book series called Science Sorted .

This book has been graded for interest at 9-11 years.

There are 160 pages in this book. This book was published 2014 by Pan Macmillan .

Mary Murphy is the author and illustrator of many books for young children, including "I Like It When. "and" Some Things Change. " She lives in Dublin, Ireland.