Liquid nitrogen is proven to be a successful coolant, but some may be cautious to make the change as they may think it is hazardous, expensive, or simply too much inconvenience to manage. With its ...
Almost 40 years ago, Smithsonian zoologist Gary Graves collected tissue samples in the jungle that formed the nucleus of the museum’s DNA collection Jack Tamisiea A wire-tailed manakin perches on a ...
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