Library.

“At least one particle can travel faster than the speed of light in a vacuum.”

The claim is not supported by the evidence. The main experimental episode behind it, OPERA's faster-than-light neutrino result, was later explained by measurement errors and superseded by results consistent with the speed of light. The remaining support consists of theoretical speculation about tachyons or misunderstood superluminal effects, not a confirmed observation of any particle traveling faster than light in vacuum.

“It is theoretically possible to travel between two points in the Universe at an effective speed faster than the straight-line speed of light, according to some interpretations of physics.”

The claim is well-supported by peer-reviewed physics literature and high-authority institutional sources. General relativity admits spacetime geometries — such as the Alcubierre warp metric and traversable wormholes — in which effective transit between two points occurs faster than a light beam traveling the conventional path, without any local object exceeding c. The claim's careful qualifiers ("theoretically possible," "effective speed," "some interpretations of physics") precisely match how mainstream physics discussions frame these solutions, even though significant engineering and energy-condition obstacles remain.