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In the Preface of her book, Our Ice is Vanishing / Sikuvut Nunguliqtuq, Shelley Wright encapsulates the issue: "The Arctic is ruled by ice. For Inuit, it is the platform on which life is lived. But the ice is melting and becoming dangerous. Inuit are silaup aalaruqpalianigata tusaqtittijiit – witnesses and messengers of climate change."

Monday, December 2, 2019

The Radioactive Elements

Although the radioactive elements uranium and thorium were discovered early in the history of the elements — 1789 and 1828, respectively, years before the advent of the Periodic Table — radioactivity itself was unknown until 1896 when Henri-Antoine Becquerel (1852-1908) in Paris found that uranium could expose photographic plates, even when protected by black opaque paper. The renowned Marie Curie (1867-1934) promptly made a study of all elements (that were known at that time) and determined that only two were radioactive — uranium and thorium.