A.I. search tools, chatbots and social media are associated with lower cognitive performance, studies say. What to do? Credit...Derek Abella Supported by By Brian X. Chen Brian X. Chen is The Times’s ...

What is a brain? The question might seem obvious, but it is not trivial. Neuroscience has progressed in the past century, with the development of sophisticated techniques to measure and manipulate ...

If you have ever lifted a weight, you know the routine: challenge the muscle, give it rest, feed it and repeat. Over time, it grows stronger. Of course, muscles only grow when the challenge increases ...