Dr Chris Smith and the Naked Scientist team present the latest science news, with an animal-themed special. Including what prompted scientists to put vampire bats on a treadmill, why medicinal leeches are returning to the UK, and the spiders that know which foods will satisfy their dietary needs.

Dr Chris Smith and the Naked Scientist team present the latest science news. Including a look at what is at stake at this year's UN Climate Summit, and the 80 million year old fossil revealing how birds developed their big brains. Plus, an in-depth look at whether weight loss jabs could solve the...