Sniper bullets can travel so far that the rotation of the Earth will move the target, and shooters have to adjust their aim accordingly.
Due to time dilation one could travel thousands of light years in a human lifespan without exceeding the speed of light. A full 40 year trip at 1 g will appear on Earth to last 58,000 years and cover a distance of 55,000 light years.
If the strange matter hypothesis is correct, it is speculated that a strangelet coming into contact with an ordinary lump of matter could convert the ordinary matter to strange matter. In a disaster scenario, all the nuclei of all the atoms of Earth are converted, and Earth is reduced to a hot, large lump of strange matter.
Chadwick (the discoverer of the neutron) was a student of Rutherford (discoverer of the proton) who was the student of Thomson (the discoverer of the electron).
It takes a photon 170,000 years to travel from the core of the sun to the surface, but only 8 minutes to travel the rest of the way to earth.