How It Works issue 47 free preview!

This month How It Works is packed with great articles, here are a few of our favourites:

Incredible Earth – Find out about the history of our planet, how did it form and where did life come from?

How 4G works – It is one of the most exciting technological developments in recent years, but what does it actually mean?

Comet storms – Discover what happens when Earth is bombarded by chunks of icy rock from space.

Racing bikes – What technology goes into making the fastest road bikes on the planet?

Exploring the sensory system – How do senses work? And what happens when they go wrong?

Ancient Greek theatres – Take a look at this awesome illustration of an amphitheatre, and learn how they were built and what they were used for.

How It Works issue 47 is on sale from 16 May 2013 and is available from WHSmiths, Barnes & Noble, supermarkets and all good newsagents.