It turned out that the white sphere had come to Earth to intercept the distress signal transmitted by the alien mothership in Independence Day, anticipating the day when the Reapers would return to track down Liu Hong and the others.
Therefore, before the Reapers' spacecraft could reach Earth, the sphere had crossed spacetime to arrive in the Milky Way and near Earth, intending to take a group of humans with it to preserve a spark of life for humanity.
It knew that Earth's current technology was simply no match for the Reapers, who possessed a queen.
Chapter 251