A decades-old cosmic mystery may finally be solved. Scientists now suspect that the strange X-ray glow from a distant white ...

And we’ve still got one nagging question: how do they get the sync right between the spinning helix and the video display? We can’t see any rotation sensors or feedback. Is it just tuned?

However, you can also take the Helix Sleep Quiz. This will match you with the right mattress in just a few minutes, based on the answers to some questions about your age, height, sleeping ...