the planet. The discovery of twelve volcanic alignments lends evidence to this new hypothesis. Initially, the estimated size of the impacting body required for this scenario was Moon-sized, but more recent research favour a smaller, 500-750 km-radius projectile.

Endogenic origin hypothesis

It is believed that plate tectonic processes could have been active on Mars early in the planet's history. Large-scale redistribution of lithospheric crustal material is known to be caused by plate

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