Humanity may not be extraordinary but rather the natural evolutionary outcome for our planet and likely others, according to a new model for how intelligent life developed on Earth.

The Cadillac Escalade has stood as a towering figure in the realm of luxury SUVs since its introduction in 1999. Synonymous with opulence, power, and status, the Escalade has evolved significantly ...

We suggest that as the Earth changed physically and chemically over time, its surface conditions allowed for a greater diversity of habitats for life. And these changes operate on geologic timescales ...