Scientists developed a new model, which provides mathematical evidence that singularities are hidden inside black holes.

Bohr turned to Planck's quantum theory to explain the stability ... to train a new generation of physicists. But his atomic model remains the best known work of a very long career.

But if you want the ultimate in accuracy, you’ll want a quantum atomic interferometer ... data from other sensors into the navigation model. It all depends on where you are; here on earth ...