The biggest questions about life, the Universe and everything - and how to answer them.
Our intuition tells us that the future can be changed, but Einstein's theory of relativity suggests otherwise.
Einstein’s theory of general relativity is famously weird and complicated, so we’ve explained it.
We have found plenty of apparently "Earth-like" worlds beyond our solar system.
The Universe has been expanding ever since the Big Bang, but what is it expanding into?
The Universe has a speed limit and it seems there is no way around it
It may seem obvious, but the dark sky tells us a lot about the Universe.
About 95% of the cosmos cannot be seen by any telescopes.
This one cataclysmic event gave rise to our entire Universe.
Everything around us is made of atoms, but the building blocks of the Universe are far stranger.
Scientists often change their minds or make mistakes, so why is it a good idea to believe what they say?