A timeline of genetic changes in millions of years of human evolution shows that variants linked to higher intelligence appeared most rapidly around 500,000 years ago, and were closely followed by ...

We will now discuss in a little more detail the Struggle for Existence. ―Darwin Compared with other mammals, human beings have large brains and access to types of intelligence that other animals ...

For decades, many scientists have relied on the "hard steps" model to suggest that intelligent life is rare — the improbable result of a series of unlikely evolutionary leaps. But new research by ...

How and why cognitive phenotypes vary between and within species remain contested. The cognitive demands associated with social interactions and environmental variability are hypothesized to be the ...

Birds are amazing animals. They are highly diverse in size, shape, color, and lifestyles, and detailed research continues to show that they are intelligent, emotional, and sentient beings, so being ...

From butterflies to blue whales, corals and worms, Earth is home to an incredible diversity of animals. How all of these animals evolved from earlier, simpler ancestors is one of the most exciting ...