What exactly is 3D and how do we see films and the world in three dimensions? Professor Hallux pays a visit to Sally Specs where he also asks if 3D can cause us any harm.

<p>What exactly is 3D and how do we see films and the world in three dimensions? Professor Hallux pays a visit to Sally Specs where he also asks if 3D can cause us any harm.</p>

We're the UK's children's radio station. Listen across the UK on DAB Digital Radio, on mobile and online at funkidslive.com.

<p>We're the UK's children's radio station. Listen across the UK on DAB Digital Radio, on mobile and online at funkidslive.com.</p>

Advertisement