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.
Pterosaur with 1-meter-long skull was Australia's largest known flying reptile.
