Back in 2014, physicists on a collaboration known as BICEP2 thought they had detected gravitational waves. Those claims quickly evaporated when it became clear that they had really seen patterns from cosmic dust. But they haven’t given up the hunt. An upgraded version of the experiment, BICEP3, began taking new data…
You’ve heard it before: In space, no one can hear you scream. That’s because sound doesn’t move through a vacuum, and everyone knows that space is a vacuum. The thing is, that’s not completely true.
A pair of engineers say it's possible to detect the signatures of spacecraft traveling at relativistic speeds, and we can do so using current technologies. The trouble is, their new analysis also suggests that moving through space at ludicrous speed is more hazardous than previously thought.