Detailed new scans show that the depth of the red planet's underground ice layer is extremely variable, coming within an inch of the surface in some places.
The most volcanically active body in the solar system recently exceeded its own reputation when an eruption on its surface sent up a plume of frozen gas the size of New Hampshire.
Like the boom of a jet fighter taking off, sonar noise in Puget Sound was hitting orcas with enough intensity to cause the marine mammals to race to shore, a biologist reports.
