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Particle PhysicsPhysicists 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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ArchaeologyNew 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.
By Bruce Bower -
Health & MedicineSolving 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.