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  1. Particle Physics

    Physicists dream big with an idea for a particle collider on the moon

    A lunar particle collider that dwarfs any such facility on Earth might not be impossible, according to new calculations.

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  2. Archaeology

    New clues suggest people reached the Americas around 30,000 years ago

    Ancient rabbit bones from a Mexican rock-shelter point to humans arriving on the continent as much as 10,000 years earlier than often assumed.

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  3. Health & Medicine

    Solving mysteries of reproduction helped make parenthood possible for millions

    Over the last 100 years, research has shed light on where we come from — how a single fertilized egg manages to develop into an organism that is unique, complex and most decidedly human — and technology has helped spur the process.