A seed bank in England marks 25 years of preserving the world’s plant diversity

The Millennium Seed Bank at the Royal Botanic Gardens Kew holds more than 2.5 billion wild plant seeds from around 40,000 species. The seeds are stored in sealed glass jars and foil packets, and are preserved in temperatures of minus 20 degrees Celsius ( minus 4 Fahrenheit) to guard against extincti...

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