To explain the remarkable diversity of life histories among species we must understand how evolution shapes organisms to optimize their reproductive success. The principal aim of life history ...

For decades, many scientists have relied on the "hard steps" model to suggest that intelligent life is rare — the improbable ...

Why was evolution so slow during the “boring ... lens to view Earth's evolutionary tapestry. By extending the “chart of life” back nearly two billion years, it underscores the resilience ...

Evolution is the way groups of life-forms change over time to better fit the places they live. It is why life takes "such endless forms most beautiful and wonderful," as British biologist Charles ...

Clearly, Earth is more than just an inanimate, unchanging ball of rock. As much as evolution is about life and its many forms, biology alone cannot fully explain it. By integrating the physical ...

Asgard archaea, a group of single-celled organisms, may hold clues to the evolution of eukaryotic cells ... challenging the traditional three-domain model of life. Their findings suggest these ...