To test the effect of gravity on quantum entanglement, we need to go to space

There is an up-and-coming set of technologies that uses the strange properties of atomic particles predicted by the theory of quantum mechanics, which is the physics of the very small stuff. This technology promises to bring us computers that are faster than all the machines we have ever produced before put together, as well as communication tools no snooping agency can break into and even the capacity to look into the Earth without digging.