  Quantum theory is incredibly successful, explaining the microscopic world
with great accuracy, from the behaviour of subatomic particles to chemical
reactions to solid-state electronics. There is not a single experimental
finding challenging its predictions, and ever more quantum phenomena are
exploited in technology, including interferometric sensing and quantum
cryptography. In order to explore novel applications and test the validity of
quantum physics at the macroscale researchers strive to prepare ever heavier
and bigger objects in quantum superpositions. Experiments with levitated
microscale particles are about to push this quest into uncharted waters.
