In 1932, physicists glimpsed antimatter for the first time — a strange mirror image of regular matter with mind-bending ...

Ground-based telescopes detect these emissions, but an intriguing issue arises when the high-energy gamma rays scatter off background light, creating cascades of electron-positron pairs. Surprisingly, ...

Canonical has taken significant steps to address the needs of security-conscious organisations by introducing new features in both its Kubernetes distribution and Ubuntu Long Term Support offerings.

速度超过光速，时间将会倒流（回到过去）。这个说法里，需要注意两个要素，第一个是“超过”，第二个是“光速”。因此问题的重点在于：为什么速度一定要“超过”光速，以及，为什么要超过的速度是“光速”？