Ross Hickles is a Herpetologist and Aquarist at SEA LIFE London, plus he owns over 200 pet animals including spiders, snakes and slugs. This week, he's chatting to Dan about snakes, difficult creatures to keep and how he got into herpetology!

Plus Dangerous Dan is discovering a laughing sickness, we're finding out about a transparent galaxy that contains no dark matter and we're looking at sea life in the Jurassic period!