The quest for a theory of everything – explaining all the forces and particles in the universe – is arguably... more

What’s the difference between a living collection of matter, such as a tortoise, and an inanimate lump of it, such... more

It is hard to shake the intuition that there's a real and objective physical world out there. If I see... more

Interest in the multiverse theory, suggesting that our universe is just one of many, has spiked since the movie Everything... more

Imagine a universe with extremely strong gravity. Stars would be able to form from very little material. They would be... more

Without a sense of time, leading us from cradle to grave, our lives would make little sense. But on the... more

"There is nothing new to discover in physics", declared the British physicist Lord Kelvin in 1900. That is no longer... more