A PhD student spent 400 hours counting caterpillars under streetlights. His findings changed what scientists knew about LED lighting

Over three summers, a doctoral researcher named Douglas Boyes spent more than 400 hours crouched beside English roadside hedges after dark, tapping branches with a stick and counting how many moth caterpillars fell onto a canvas tray below. Boyes, who split his time between Newcastle University and the UK Centre for Ecology and Hydrology, expected artificial street lighting to reduce caterpillar numbers by something like 10 per cent.

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