By Timothy W. Kneeland
By Anthony Aveni
By James Macdonald Lockhart
By Pía Spry-Marqués
By Robert Find
By Brenna Hassett
By G.A. Bradshaw
By Peter S. Ungar
By Edward Dolnick
By Rob Wesson
By B.J. Hollars
A nation is defined 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.