When chance intervenes

The universe can be random. That's why you exist, and the dinosaurs don't.

Apatosaurus.
(Image credit: iStock)

This is the editor’s letter in the current issue of The Week magazine.

One pivotal day 66 million years ago, a 6-mile-wide asteroid slammed into the Earth off the Yucatán Peninsula in Mexico. The explosion — as powerful as millions of nuclear bombs — kicked up billions of tons of vaporized rock, filling the sky with a dark cloud that blotted out the sun for decades. Global temperatures plunged 50 degrees. The dinosaurs that dominated the planet died off for lack of food. Their disappearance led to the rise of mammals, and eventually to the evolution of Homo sapiens. In a new BBC documentary that aired this week, scientists who've drilled down into the asteroid’s crater say that it hit "in the worst possible place" — shallow coastal waters where the underlying sediments were filled with gypsum; if the big rock had entered the atmosphere just 30 seconds earlier or later, it would have landed in the deep Atlantic or Pacific Ocean and not created the catastrophic cloud of sulfur. Most dinosaurs would have survived. The human race might never have arisen.

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William Falk

William Falk is editor-in-chief of The Week, and has held that role since the magazine's first issue in 2001. He has previously been a reporter, columnist, and editor at the Gannett Westchester Newspapers and at Newsday, where he was part of two reporting teams that won Pulitzer Prizes.