We hoped extraterrestrials could decode the plaque attached to the Pioneer spacecraft in the 1970s. Would we be able to figure out theirs? A recent paper claiming that a comet was the source of SETI’s ...
One evening last year, when his newborn daughter was small enough to hold with one arm, René Heller reached for a book to occupy his mind while he rocked her to sleep. Heller, an astrophysicist at the ...
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