The surprising benefits of whale poo 🐋 Whales make vast migrations around our planet. As they do so, they make significant contributions to the wellbeing of ocean ecosystems. But with many species of whale endangered due to human impacts on the ocean, the work of these great ocean gardeners may be lost without our protection. This is #OurPlanetEarth 🌍 A BBC Studios Natural History Unit co-production with Wellcome Trust | BBC Earth