A four-year-old asks roughly 300 questions a day, and many of those questions seem to cluster tightest just before nap and just before bed, when the brain may be consolidating what it learned that day

Preschoolers ask hundreds of questions a day, and the bursts before nap and bedtime line up with when the brain does its heaviest consolidation work — a pattern University of Michigan sleep researchers have begun to map at the neuron level. The post A four-ye…