"Very little fraud is in these improper payment numbers. However, all fraud is considered an improper payment," said GAO's Hannah Padilla ...

If dark energy is evolving over time, its impact on cosmology would be profound. It would mean that Einstein’s cosmological constant, long assumed to be a universal constant, would need to be modified ...

Here's how To tackle these issues, the researchers suggested a simple modification - adjusting the universal constant of gravitation on different distance scales. Watch | French artist Saype ...