Quantum physics says particles can behave like waves. A new experiment just demonstrated this with a cluster of thousands of atoms, the largest 'quantum object' ever observed in wave form.
At extreme pressures, water becomes something impossible: a solid that flows like a liquid and conducts electricity. It may explain why Uranus and Neptune are so weird.
From D-Wave's scalability breakthrough to Google's error correction milestone, quantum computing keeps achieving what experts said was impossible.
The largest black hole collision ever recorded created a monster 225 times the mass of our sun, challenging what physicists thought possible about stellar evolution.
Physicists have used a 1930s mathematical theorem to demonstrate that the universe cannot be a computer simulation, settling a question that has haunted science and philosophy.