STEM Challenges

The greatest telescopes in history are being built right now. The Extremely Large Telescope, LISA, the Roman Space Telescope, the SKA, and the Vera Ru...

Here the boundary between physics and philosophy blurs. String theory, the multiverse, loop quantum gravity, the many-worlds interpretation — these ar...

Dark matter, dark energy, the Hubble tension, the black hole information paradox — these are not textbook questions waiting for students to catch up. ...

For millennia, astronomers could only see the universe through light. Now we can hear it in gravitational waves, taste it in neutrinos, and feel it in...

The universe is a particle accelerator far more powerful than anything humans have built. Cosmic rays slam into our atmosphere with energies a million...

Quantum mechanics — the physics of the incredibly small — has unexpected consequences on cosmic scales. Discover how quantum tunneling allows the Sun ...