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  1. Life

    Smithsonian secrets most likely to blow your mind

    Millions of objects stashed at a site open only to select visitors tell the history of Earth's inhabitants.

    By Meghan Rosen and Stephen Voss
  2. Artificial Intelligence

    Is AI bad for critical thinking? It depends on when you use it

    Using AI later in solving tough problems boosts critical thinking and memory, a study shows, highlighting trade-offs between speed and reasoning.

    By Aaron Brooks
  3. Health & Medicine

    Fluoride in U.S. drinking water does not reduce IQ, a new study finds

    Claims that fluoride in drinking water causes cognitive delays in kids are driving U.S. policy. A new study finds no evidence to back them.