Hedgehog numbers in the UK have fallen from 30 million to less than 1 million since mid-last century. Dr Sophie Lund Rasmussen is fixing that. She followed them around for a year peering into people's gardens to see where they went. She dissected hundreds peeled off roads to learn how long they lived. Now she's learning to communicate with them and keep them safe using sounds no one can hear.
","author_name":"Elliot Connor"}