"It's hard to imagine the size of things you have never seen, especially if they're really, really BIG or really, really tiny. Sometimes a measurement can help... but sometimes it can just look like a meaningless number. So another way to imagine its size is to compare it to things you have seen."
That is what this book tries to do in visually-appealing graphic form, although there is still some of the "meaningless numbers" in here in my opinion. For example speeds are presented in kph, kilometres per hour, and not miles per hour which are more relatable in the UK.
But there are interesting facts in here too such as if the Earth's history was scaled down to 1 year then humans would only appear for about the last 35 minutes of it. I had never been able to visualise this before.
There is plenty on each page to catch the eye in this book which is more a pick up and browse book than read cover to cover book, especially as not each topic may appeal. Each chunk of info is bitesize making it easy to digest quickly, and where the book works well is where it presents something interesting in a way that makes it easier to comprehend, for example I read to my 7-year-old daughter how many omelettes could be made from an Elephant bird's egg which she could relate too. Unfortunately she did ask follow up questions about the amount of omelettes the other eggs presented on the page could make too with that information being unavailable in the book (although the bee humming bird egg would make a very small omelette indeed, maybe a doll-sized one) so maybe there is a point here that the book does pique the interest but may not keep it.
Throughout the book the graphics are great and it is that that will sell the book, but the written information is more interesting and more relatable in some places than others. Overall the book would be even better if it were in interactive form, such as on the web. Then kph could be switched to mph, you could guess the amount of people that could fit on a blue whales tongue and then count them as they hop out and the omelette information requested above would be more easily available as there would be the room for it.
So the book looks great but the written content is more hit and miss.