Niki Wilson is a science writer who grew up dodging bears in Jasper National Park, Canada. She loves telling stories about everything from mammoths to mountain pine beetle. Visit her in the twitterverse @niki_wilson, or at nikiwilson.com.
A nation is deļ¬ned by what it preserves.
The way they live, the food they eat, and the effect on us
A true but unlikely tale
Story and Photographs by William Rowan
Increasing day length on the early Earth boosted oxygen released by photosynthetic cyanobacteria.