Nobel laureate Kip Thorne, who will deliver the Royal Irish Academy 2025 Hamilton Lecture, on his lifelong quest to ...

Global Positioning System (GPS) satellites continuously beam down ultra-precise timestamps, each message essentially saying, “It was 12:00:00.000001 when I sent this.” ...

As scientists get closer to putting humans on Mars, the need to understand why clocks tick faster on the red planet is more ...

We believe things because doing so helps us belong and upholds a certain moral order, but not necessarily because they are ...

For the first time, physicists have simulated what objects moving near the speed of light would look like — an optical ...

The story begins with the black hole information paradox. According to relativity, anything that falls into a black hole is ...