Blue sheep in Mount Qomolangma national nature reserve in Lhasa, the capital of south-west China's Tibet Autonomous Region.
Photograph: Purbu Zhaxi/Xinhua/Alamy
Cape fur seals (
Arctocephalus pusillus)...
While its doors have been closed to the public, scientists have been busy digitising its vast archive – from 100-year-old insects to rare mineralsThe...