When a baby smiles at you, it's almost impossible not to smile back. This spontaneous reaction to a facial expression is part ...

Some parts of our bodies bounce back from injury in fairly short order. The outer protective layer of the eye-called the ...

Some parts of our bodies bounce back from injury in fairly short order. The outer protective layer of the eye—called the ...

Researchers in Japan built a miniature human brain circuit using fused stem-cell–derived organoids, allowing them to watch ...

Pea-size clusters of human cells called brain organoids inspire both hope and fear. Experts are debating how scientists can ...