Amnesty International's online tool to help validate videos showing human rights abuses
BBC World Service
A deadly threat to horses or a vital moth habitat? A new survey maps the ragwort plant.
BBC Radio 4
Michaela Strachan presents the story and sound of the rock pipit. (R)
Cyfle i glywed rhai o bigion 'Galwad Cynnar' eto.
BBC Radio Cymru
Historical patterns from preserved plants.
Elevators: A cultural history. Also, Indian militants who embrace electoral politics.
2/2 Is mining the deep ocean the solution to the world's growing demand for valuable metals?