For these discoveries, Marie Curie received a Nobel prize. Particle diagrams can be used to show the atoms of elements. All of the atoms in a particle diagram must be the same colour and size.

Now, to make the diagrams simpler we often just draw them as circles. So now an atom is the smallest particle of an element. There are over one hundred different elements and these are all made of ...

Is there a time of day or night at which nature's heaviest elementary particle stops obeying Einstein's rules? The answer to that question, as bizarre as it seems, could tell scientists something ...