Physicists have proposed a new mathematical model for a time machine that permits forwards and backwards time travel.

# spacetime

# The Physicist and The Philosopher

Ian Sillett reads about a momentous clash between two intellectual giants in 1922

# Superluminal Communication: We’re Talking Faster than Light

Kruti Shrotri questions whether we’ll ever be able to communicate faster than the speed of light.

# Time: Going Places

What’s the truth about the relationship between space and time? Isobel Nicholson tells us…

# What time is it?

Time is so integral to our experience of life that we could be forgiven for thinking it is a simple concept. But many physicists are intrigued by the question of what exactly time is…

# Are we living in The Matrix?

If The Matrix was real how would we know? Could an experiment ever provide the answer?