The earliest recorded vertebrates had four eyes to escape predators in the ancient Cambrian ocean, according to half-a-billion-year-old fossils from China that shed light on our evolutionary origins.

The earliest ancestors of all backboned animals, including humans, may have viewed the world with four eyes, not just two.

“Early humans used chewing sticks, twigs, bird feathers, animal bones, and plant fibers to remove debris from their teeth,” ...

Since January, the genealogical nonprofit American Ancestors has led the effort to identify the descendants of people enslaved by Harvard faculty, staff, and leadership — taking over the project ...