Quirks & Quarks for Oct. 18, 2014

This week, we find out how birth control residue is harming fish; how plants use teeth and claws for defence; how to make a material bloody slippery; we home in on autism's complex causes; we look into crowd-sourcing science on the seas; and we count all the stars in the sky. 

Theme music bed copyright Raphaël Gluckstein, Creative Commons License by-nc-nd-2.0