This episode of The Naked Scientists: what's at stake at this year's UN climate summit in Azerbaijan? Also, the 80 million-year-old fossil revealing how birds came by their big brains; and why the UK's oldest satellite has wandered off over the Americas... Like this podcast? Please help us by <a href="https://www.thenakedscientists.com/donate">supporting the Naked Scientists</a>

Are we on track to end new infections of HIV?

The Naked Scientists flagship science show brings you a lighthearted look at the latest scientific breakthroughs, interviews with the world's top scientists, answers to your science questions and science experiments to try at home.