Teenagers are increasingly turning to AI for advice, emotional support and decision making, according to a new study. Common Sense Media found that over 70% of teens have used AI companions, with many finding the interactions as satisfying as talking to real friends. Experts warn this trend could harm social skills and mental health, as teens rely on AI for validation and avoid real-world challenges. Concerns also include inappropriate content and the lack of regulation of AI platforms. Researchers emphasize that while AI can assist, it should not replace human connections, especially during adolescence, a critical time for social and emotional development.

A new study offers the first detailed map of the human brain throughout and after pregnancy. It was published in the journal Nature Neuroscience on Monday. The study looks at one woman's brain but kicks off a large international research project that aims to scan the brains of hundreds and could one day provide clues about disorders like postpartum depression. Researchers say the transition to motherhood affected nearly every part of the brain. More than 80% of the regions they studied had reductions in the volume of gray matter, where thinking takes place. Researchers said this probably reflects the fine-tuning of networks of interconnected nerve cells.