In the largest study of its kind, scientists have accurately documented the massive change in animal morphology over the last ...

She believes the lizards probably have many more urban adaptations including color, claw, tail shape and egg-laying behavior.

Princeton study maps 200,000 years of Human–Neanderthal interbreeding Modern humans and Neanderthals interacted over a 200,000 year period, says geneticist Joshua Akey. Date: July 13, 2025 ...

Over the past century, the world's human population has exploded from around 2 billion to 8 billion. Meanwhile, the average fertility rate has gradually declined. And if that trend continues as it ...

Over time, their population shrank dramatically and stayed small, especially after reaching the island.

According to Ragsdale’s research, ancient human populations were not a single, unified group. Instead, they occasionally split into subgroups that separated and rejoined over time.

Global fertility rates have been falling for decades and are reaching historically low levels. While the human population now exceeds 8 billion and may top 10 billion by 2050, the momentum of growth ...