Physicists worldwide have tried to establish for over a hundred years a theory of quantum gravity. Universe Unravelled with the Stephen Hawking Centre s1e18: Do We Need Quantum Gravity? (short)
Gravitons: haven’t yet been observed. ibid.
We can make precise prediction about what happened in that first second. Universe Unravelled with the Stephen Hawking Centre s1e19: The First Second (short)
Einstein realised that space/time is not a fixed background on which physics plays out, but it interacts with the very matter in our universe. Universe Unravelled with the Stephen Hawking Centre s1e20: Spacetime Matters (short)
This new idea of General Relativity correctly described how gravity works. Universe Unravelled with the Stephen Hawking Centre s1e21: Space, Time & Gravity (short)
The next piece of the puzzle … Dark Energy and Dark Matter. Universe Unravelled with the Stephen Hawking Centre s1e22: Modified Theories of Gravity (short)
Scalar Tension theories that are very similar to General Relativity … They allow the gravitational constant to be not constant. ibid.
We uncover some black hole secrets … Black holes emit heat … After trillions of years they evaporate completely … The discovery of Hawking radiation. Universe Unravelled with the Stephen Hawking Centre s1e23: Radiation & Quantum Gravity (short)
The key to unlocking the early mysteries of the universe lies with gravitational waves. Universe Unravelled with the Stephen Hawking Centre s1e24: New Windows on the Universe (short)
There’s still so much to discover, understand and explore. Universe Unravelled with the Stephen Hawking Centre s1e25: Into the Future (short)