Quantum physics is mind-bending, but it is also one of the most successful scientific theories ever put forward. It began to take shape in the early 20th century, when classical ideas failed to explain some observations. Get to grips with a weird world with this "Instant Expert" guide.
The physics blogs are abuzz with rumours that a particle of dark matter has finally been found. If it is true, it is huge news. Dark matter is thought to make up 90 per cent of the universe's mass and what evidence there is for it remains highly controversial.
It was supposed to be the first great scientific discovery of the 21st Century - the physicists believed that they were close to making the first direct detection of gravitational waves, the ripples in space-time generated by supernovas and coalescing neutron stars.
Newton watched an apple fall to the ground and wondered why it descended perpendicularly to the ground and not sideways or upwards. But one question he didn't ask was whether apples and oranges fall the same way, or if an apple falls the same way in autumn and in spring....