The appearance of advanced life forms in the universe can occur much earlier than expected based on the assumption of an empty universe, suggesting that the initial assumption is unlikely. This challenges the Fermi Paradox, bringing hope for the search for extraterrestrial life.
Although it may take millions of years for a high-speed space sphere to travel from where it originated to Earth, in the rare case that it could be headed our way, we would only have a short amount of time to prepare due to how rapidly it's traveling.
The collision of spheres from the potentially faster-than-light travel of grabby alien civilizations raises the possibility that we are not the first such occurrence.