"History shows us that whenever you do open a new 'energy window,' you never really know what you're going to find. It's completely unexplored." ...

However, after reaching an altitude of 5,300 meters, Hess unveiled a natural source of high-energy particles from space. Today, we call those particles cosmic rays. Now, H.E.S.S. scientists are ex ...

Using an observatory under construction deep beneath the Mediterranean Sea near Sicily, scientists have detected a ghostly ...