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‘Darkening’ cities is as important for wildlife as greening them

By Nick Dunn, Professor of Urban Design, Lancaster University

For billions of years, life has depended on Earth’s rhythm of day and night. DNA codifies body clocks in all animals and plants, which helps their cells act according to this cycle of light and dark.

Humans have disrupted this cycle, though, by producing artificial light at night. A growing body of scientific…

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