What university do you go to? <a href=" http://acaauto.com/foredi-serang-banten.pdf ">foredi kaskus</a> One of the leading theories explaning this abnormality is a Pluto-sized object that rammed into Mars about four and a half billion years ago. The collision disrupted the planet's magnetic field, which in turn led to an abrupt loss of the planet's atmosphere. Following that abrupt loss, Mars has been slowly, but surely, losing its atmosphere to space. "The data we have doesn't prove this," said Webster. "But it does fall in line with the theory."