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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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3 mar 1898 año - Discovery of Krypton (Sir William Ramsay and Morris Travers)
Añadido al timeline:
Periodic Table Timeline
By
MICHELLE MORGAN SILLER
6 dic 2018
0
0
349
fecha:
3 mar 1898 año
Ahora mismo
~ 127 years ago
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