Dr. Hoffman established a family network to help people with borderline personality disorder, a support system that become a model for other conditions.
A psychology professor, he set about trying to understand what triggers giggles and guffaws and wrote a definitive book on the subject. He could also make you laugh.
Images of child sex abuse have reached a crisis point on the internet. Now, science is beginning to shed light on why people abuse children in the first place.
By studying chicken embryos in the bedroom of her house in Turin, Italy, Dr. Levi-Montalcini discovered how embryo cells built a latticework of intricate connections.
Failing health after sudden grief — especially the loss of a spouse — has been reported by medical researchers. But it seems to be statistically quite rare, experts said.