The best known symbol of the Nuclear Age—the Bulletin's "Doomsday Clock"-had a hard-to-ignore debut. Early Bulletins were newsletters, lacking magazine-style covers. But when the June 1947 Bulletin arrived, it had a first-ever cover—a pay-attention-to-me jack-o'-lantern orange cover. Imprinted over the orange: a boldly simple seven-inch by seven-inch clock face. The hour hand was at 12; the minute hand at about seven minutes to. Humankind, the clock said, was in dire straits.
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