
Ultra-cold freezers can keep vaccines chilled to sub-arctic temperatures. But why does anything need to be kept that cold? And what happens to regular food items when they're subjected to such extreme temperatures?
via CBC | Top Stories News

Ultra-cold freezers can keep vaccines chilled to sub-arctic temperatures. But why does anything need to be kept that cold? And what happens to regular food items when they're subjected to such extreme temperatures?
via CBC | Top Stories News
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