Scientists have observed that Mars spins faster each year, but the cause was unknown. A new study published in the Journal of Geophysical Research: Planets suggests a massive plume of light material deep in Mars' mantle may be responsible.
This plume could explain not only the planet's faster rotation but also how it retains heat longer than expected. The research used data from NASA's InSight lander to model Mars' interior and found that the plume might influence the planet's spin by shifting mass inward, similar to a spinning figure skater pulling their arms in.
The findings challenge previous assumptions about how small rocky planets cool and die. Researchers say Mars may remain geologically active longer than previously thought.
