Space, Earth and the natural world, explained.
You spend about a third of your life asleep, yet scientists still argue over its exact purpose. Here is what the evidence supports, and where it comes from mice rather than people.
Reading about yawning is enough to make many people yawn. Scientists have tested why, and the answers are less tidy than the popular explanations.
A UC Santa Cruz mouse study found psilocybin grows and matures brain connections fast, and the rewiring can be split from a psychedelic-type behavior.
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