... high with dozens of tiny ridges radiating out. It is as if "something is pushed up," said MIT planetary scientist Maria Zuber, who is part of the science team. Prockter guessed that it could be remnants of a volcano. Other scientists think ...

... nothing they've seen before. ''Similar features do not occur on any glacial or polar terrain on Earth,'' said Maria Zuber of the Massachusetts Institute of Technology. Researchers discussed the new three-dimensional images supplied by ...

... northern hemisphere, there is a huge basin that dips down to about six miles below the average elevation of Mars. Maria Zuber, a professor at Massachusetts Institute of Technology and a co-author of the mapping project, said the basin "is ...