Has Earth been visited by an alien spaceship? Harvard Professor Avi Loeb vs. everybody else

A highly unusual object was spotted traveling through the solar system in 2017. Given a Hawaiian name,ʻOumuamua, it was small and elongated—a few hundred meters by a few tens of meters, traveling at a speed fast enough to escape the Sun’s gravity and move into interstellar space.

Source:
https://phys.org/news/2021-02-earth-alien-spaceship-harvard-professor.html