Is there an Outer SpaceX? With 3I/ATLAS set to fly by Earth in just over a week, experts continue to speculate over its origins. Harvard Scientist Avi Loeb believes that if aliens, the comet wouldn’t ...

Phillip Bell III was in tears when he phoned his grandparents’ farm outside Sacramento. “Come and help me please,” his grandmother, Lorna Barnes, recalled the then-16-year-old sobbing in March 2023.

The Dark Forest theory is one proposed solution to the famed Fermi Paradox, which has bewitched astronomers for more than half a century. To put it concisely, the paradox asks if the cosmos is nearly ...

Editor’s note: This story is part of the annual Mosaic Journalism Program for Bay Area high school students, an intensive course in journalism. Students in the program report and photograph stories ...