Black holes form natural time machines that allow travel to both the past and the future. But don't expect to be visiting dinosaurs any time soon.

The scientists who precisely measure the position of Earth are in a bit of trouble. Their measurements are essential for the ...

For decades, he hid his time-travel obsession. Now, he is challenging the assumptions that underpin our universe.

Quirks & Quarks features our ever-popular listener question show, where we find experts to answer your questions. But here are ten mysteries that science has yet to answer.

Over time, the black hole’s rotation—called spin—can increase dramatically. According to models, a non-rotating black hole can reach near-maximal spin as it grows to roughly 2.45 times its ...

Could Mysterious Black Hole Burps Rewrite Physics?

Gravitational waves stretch and squeeze the fabric of space and time itself. When space/time is squeezed, pulsar pulses ...

A new model could provide scientists with a better idea how gravitational waves, or ripples, created by colliding black holes affect the very fabric of space-time.

Black holes continue to grip our imagination. These cosmic powerhouses twist space and time so intensely that even light cannot escape once it crosses a certain boundary. Their defining edge—the ...

Massive objects warp the fabric of space-time (shown here as a grid) through which photons travel. If the warping is significant enough, such as around a black hole, the photon’s straight path ...

The activity profile of the black hole was new and exciting every time that we looked at it. ... These particles travel at velocities near the speed of light and shoot out bright bursts of radiation.

Black holes form natural time machines that allow travel to both the past and the future. But don't expect to be visiting dinosaurs any time soon. When you purchase through links on our site, we ...