In 2012, Felix Baumgartner jumped from a capsule hanging beneath a balloon, about 39 kilometres up. In that extremely thin air almost nothing slowed him down, and he reached around 1,358 km/h in free fall, or Mach 1.25. He became the first person to exceed the speed of sound with nothing but his own body.
Cooled below −183 °C, oxygen turns into a pale blue liquid. Pour it between the poles of a strong magnet and, instead of flowing away, it hangs suspended between them. The reason lies in its unpaired electrons, which respond to the magnetic field. Liquid nitrogen, by contrast, is colourless and pours straight through.
On 24 December 2024, the Parker Solar Probe skimmed past the Sun about 6 million kilometres from its surface. Accelerated by the Sun's gravity, it hit nearly 692,000 km/h, or about 192 kilometres per second. At that pace, it could travel from London to Tokyo in under a minute.