Cover image for Dark matters : nature's reaction to light pollution / Joan Marie Galat.
Dark matters : nature's reaction to light pollution / Joan Marie Galat.
Publication Information:
Markham, Ontario : Red Deer Press, 2017.

Physical Description:
70 pages : colour illustrations ; 26 cm
Dark Matters introduces readers to the causes and harmful effects of light pollution.


Call Number
Material Type
Home Location
551.566 GAL Book Junior Collection

On Order



Light and dark have affected the very ways humans, plants, and animals have grown and thrived. In fact, light and dark have affected pretty much the entire natural world around us. But lights from cars, streetlights, houses, shopping malls, skyscrapers, and other structures make towns and cities glow with light so bright it can be seen from outer space. What happens when humans tamper with the age-old balance of day and night?

Told through the eyes of thirteen-year-old Joan who loves the outdoors, Dark Matters introduces young readers to the fragile animals that are impacted by our increasingly threatened nighttime skies.

Come discover the amazing night life of frogs and bats, turtles and fireflies, birds, plants, and so much more. And learn how their lives and ecosystems are negatively impacted by light--much of which is so unnecessary.

This book is packed full with fascinating and unexpected facts and illustrations, and comes with tips and suggestions on how young people can help reduce light pollution.

Because dark matters!

Author Notes

Joan Marie Galat's
publications include The Discovery of Longitude , the Dot to Dot in the Sky series and Day Trips From Edmonton .

The Discovery of Longitude was the winner of the 2013 R. Ross Annett Award for Children's Literature. Joan Marie lives in Edmonton, Alberta.



" Day and night reveal two different worlds. For most people daytime is more familiar. Light makes us feel safe because we are most comfortable when we can see what is around us. Vision is our best sense and we rely on it. In true night-time darkness, familiar landscapes change. The air feels different. Stars become visible. New sounds seem to emerge. The unknown creeps closer. It is natural to want to respond by turning on the lights. People have only been able to turn on lights for just over 100 years. For the millions of years before that, animals and plants evolved in a cycle marked by both day and night. Our environment has not had enough time to adapt to light at night. And animals' natural behaviors are being impacted in ways we are only beginning to understand. The use of lighting has seemed harmless for a long time. Now scientists are discovering there is a cost to Earth's ecosystems. As animals and plants suffer, people will experience consequences too. Excerpted from Dark Matters by Joan Marie Galat All rights reserved by the original copyright owners. Excerpts are provided for display purposes only and may not be reproduced, reprinted or distributed without the written permission of the publisher.