Posted by BC on March 14th, 2008
Northern Hemisphere: Smooth / Southern Hemisphere: Rough
During a recent conference, planetary scientists discussed ideas as to why Mars has different types of terrain in the northern and southern hemispheres. Two schools of thought have been discussed over the past couple of years as to why the difference. One idea is that something huge crashed into the planet and disrupted the “normal” surface. Another idea is that molten material inside the planet “bubbled” up to cause the smooth area.
It seems that scientists are back to the collision model. If a “…500-mile-wide asteroid [hit Mars] at about 4 miles per second [it] would create an impact scar several thousand miles across and blanket the rest of the planet with a layer of crustal debris several miles thick” (S&T). Everyone involved knows that more research has to be done to determine why Mars has a split surface personality.
One person has commented
kady tani said,
May 13th, 2008 @ 10:32 pm
i need information on the northern hemisphere in Mars