A double explosion, in which a dying star split, then recombined, may be a long-hypothesized but never-before-seen "superkilonova." ...
It's a common storytelling trope: the stubborn foe who is eventually revealed to be a much-needed friend. Biology has its own ...
If stretched out, human DNA would be about 2 meters long. For this long strand to fit inside the cell nucleus, which is about ...
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