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    The Comforting Certainty of Unanswered Questions

    Light was thought to travel through aether like waves on a lakeShutterstock You might know the anecdote. In April 1900, Lord Kelvin, one of the most prominent physicists of the 19th century, stands in the speaker’s well of the Royal Society in London. Surveying the state of scientific knowledge at the dawn of a new […]

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    Splitting Image: The Alternate Realities of the Multiverse

    We tend to focus on major decisions as having momentous effects, but what if something as simple as a missed train could change the course of your life? And what if you follow two different paths to see which turned out better? That’s the premise of the 1998 film Sliding Doors, in which Gwyneth Paltrow stars […]