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 true but unlikely tale
Story and Photographs by William Rowan
Increasing day length on the early Earth boosted oxygen released by photosynthetic cyanobacteria.
Genomic evidence shows that Denisovans and modern humans may have overlapped in Wallacea.
Evapotranspiration is the largest source of water vapor in the Congo rainforest during the spring rainy season.