Advanced satellite and lidar mapping has uncovered signs that the Tintina fault in Canada's Yukon may be primed for a powerful earthquake.
Astronomers are confident that the Milky Way and Andromeda galaxies will collide, merge, or at least interact with one another in the next few billion years. What will that merger look like? Both galaxies have dwarf galaxies, and astronomers want to know if their behaviour can predict the future of the merger.

