However, scientists still do not know where the water here on Earth came from in the first place. One leading idea is that space rocks such as comets and asteroids delivered water to the Earth ...
This description fits perfectly to Comet C/2023 A3 or Tsuchinshan-ATLAS, which is most likely to come closer to the Earth in autumn 2024. According to 'Daily Star', dubbed ‘comet of the century ...