Rhino release: Epic journey to freedom in Rwanda
Five zoo-born eastern black rhinos have been transported from Europe to Africa.
Author Archives: BBC News - Science & Environment
Nasa puts up deep-space atomic clock
The miniaturised timepiece will be used to overhaul deep-space navigation if it proves its worth.
Rhino release: European parks bring animals to Rwanda
Five critically endangered rhinos from European zoos are flown to Rwanda to be released into the wild.