Revealing the genome of the common ancestor of all mammals

Integrating data from all continents and major biomes, we conservatively estimate 20 × 1015 (20 quadrillion) ants on Earth, with a total biomass of 12 megatons of dry carbon. This exceeds the combined biomass of wild birds and mammals and equals 20% of human biomass.

Mammals lived alongside some of the earliest dinosaurs, controversial study claims

Normally Taking a Million Years: Scientists Successfully Fuse Chromosomes in Mammals