Illustrations: Alexis Jamet

Elemental Light Week

The Invention of the Light Bulb Fundamentally Changed Our Biology

Too much light at night, too little during the day: how our bodies are evolving to adapt to modern life

Published in
7 min readFeb 10, 2020


This story is a part of Elemental Light Week, a 5-day series on what light does for your body, brain, and well-being.



Dana G Smith

Health and science writer • PhD in 🧠 • Words in Scientific American, STAT, The Atlantic, The Guardian • Award-winning Covid-19 coverage for Elemental