At 5:30 a.m. mountain war time on July 16, 1945, the world’s first nuclear weapon detonated over a flat, arid stretch of New Mexico desert. The Trinity test, as it was code-named, confirmed that an ...

Researchers have crossed a threshold that once belonged squarely to science fiction: they have built working models of brains, both in silicon and in living tissue, that can learn, adapt, and even ...