Space-time is the most powerful idea in modern physics. Yet a bold new philosophical challenge suggests we may not actually understand what space-time is — and that confusion about language is quietly ...

Physicists have long struggled with their goal of making gravity a quantum force. A radical post-quantum approach might solve ...

Physicists have tested the hypothesis that gravitational fluctuations in space-time can destroy quantum superposition and explain why large objects do not behave like particles. An experiment in the ...