Time to get those waders on listeners as we head into the aquatic realm for this episode of HMG.  Martha Glennon, from Not Bourne Yesterday (and the People vs. Sea Otters fame), is our guide into the crystal clear, watery world of chalk streams - Britain's rarest type of habitat.  We find out about what makes them so special, what lives inside them and what YOU can do to find yourself having a lovely time in a chalk stream just like we did... For more on the Not Bourne Yesterday, check out: www.chilterns.org.uk/flagship-projects/not-bourne-yesterday-chalk-stream-communities-of-the-chilterns To  join our Patreon club and get exclusive episodes of the show: www.patreon.com/howmanygeese