Plus: Neuralink's second trial with a human patient appears to have been a success This is today's edition of The Download, our weekday newsletter that provides a daily dose of what's going on in the ...

Human evolution has long been tied to growing brain size, and new research suggests prenatal hormones may have played a surprising role. By studying the relative lengths of index and ring fingers — a ...

Throughout most of human history, evolution progressed slowly. Small genetic changes took thousands of years to permeate populations. Natural selection was intentional, reactive, and gradual. However, ...