What the heck is energy?
Electricity, fuels, heating: energy is all around us. Physicists talk about it all the time to decode the mechanisms behind basically every process. Yet a good definition of energy is hard to come by: what is this “energy”?

Electricity, fuels, heating: energy is all around us. Physicists talk about it all the time to decode the mechanisms behind basically every process. Yet a good definition of energy is hard to come by: what is this “energy”?

Almost exactly a year ago, LIGO announced the detection of gravitational waves. Let’s celebrate answering two deep questions about them. They are hard, but puppies will keep our spirits up! Continue reading 2 deep questions on gravitational waves (with puppies!)