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Your ‘Where I Work’ series (see, for example, Nature580, 158; 2020) reminds me that travel itself can be scientifically productive. Travel can free the mind from its routine tasks, opening it up to new ideas. The polymerase chain reaction, for example, came to the late Kary Mullis while driving late one night from Berkeley to Mendocino in California. A lynchpin in today’s screening of thousands for COVID-19, it earned him the Nobel Prize in Chemistry in 1993.