Image: Space selfie from XMM-Newton X-ray observatory

Launched on 10 December 1999, XMM-Newton is an X-ray observatory designed to investigate some of the most violent phenomena in the Universe. Sources that emit large amounts of X-rays include remnants of supernova explosions ...

How does light travel?

Ever since Democritus – a Greek philosopher who lived between the 5th and 4th century's BCE – argued that all of existence was made up of tiny indivisible atoms, scientists have been speculating as to the true nature ...

How to build a time machine

Every now and again, we all indulge in dreams about travelling in time. Wouldn't it be wonderful to return to that specific point in the past to change a bad decision or relive an experience – those halcyon days of childhood, ...

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