The Svalbard "doomsday" vault - widely known for protecting global food crop seeds - has accepted its first delivery of forest tree species seeds.
Norway spruce and Scots pine samples have entered the vault inside a mountain on the Arctic archipelago.
The frozen depository opened in 2008 and is designed to withstand all natural and human disasters.
Researchers hope the tree seed samples will help monitor long-term genetic changes in natural forests.
BBC: Forest tree seeds arrive at Svalbard's 'Doomsday vault'
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