<p>Corals protect humans and sustain 25% of all marine life. But reefs are under threat from climate change, and mass bleaching events mean that some scientists estimate they could disappear by 2100.</p><p>In this episode, Graihagh Jackson is joined by BBC CrowdScience presenter, Caroline Steel. We go to Puerto Rico to see how self-duplicating, carnivorous coral could be the solution. We also speak to the scientist who helped discover what was causing coral bleaching in the first place - back when climate change was commonly denied.</p><p>This programme was first broadcast in 2024.</p><p>Guests: Dr Ove Hoegh-Guldberg, Professor of Marine Studies at the University of Queensland in Brisbane Dr Stacey Williams, Executive Director at the Institute for Socio Ecological Research</p><p>Picture: Prickly alcyonarian - Dendronephthya sp. Orange red colored soft coral. Credit: ultramarinfoto via Getty. </p><p>Presenters: Graihagh Jackson and Caroline Steel Producer: Octavia Woodward Production co-ordinator: Brenda Brown Editor: Simon Watts Sound Engineer: Tom Brignell</p><p>Got a climate question you’d like answered? E-mail the team: [email protected]</p>