Aux origines de l'humanitéEclipse Over America
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S44 • E18 23 août 2017 55minOn August 21, 2017, millions of Americans will witness the first total solar eclipse to cross the continental United States in 99 years. While hordes of citizens prepare to flock to the eclipse’s path of totality, scientists, too, are staking out spots for a very different reason: to investigate the secrets of the sun’s elusive atmosphere.