The cosmological constant problem

20 amazing answers t o curious

Our eyes paint such vivid portraits of the world around us that it’s easy to forget how much of our surroundings go unseen. Wi-Fi signals pinging this way and that, subatomic particles and radiation z

Flicking through the pages of BBC Sky at Night Magazine each month, you’d be forgiven for thinking astronomers have black holes pinned down. Whether it’s the dramatic imaging of black hole shadows by

Modern science is inextricably linked to mathematics. I’m not just referring to numbers here – for example numerical measurements of things like time, speed and energy – although that’s an important p

It’s one of the most basic concepts in physics, governing the behaviour of everything from subatomic particles to galaxies

The difficulty in creating a theory of ‘quantum gravity’ is that the two ideas look at the Universe at completely different scales. Quantum mechanics looks at the smallest scales of the particles that