Deep Hole Found on Mars!

This isn't UFO related but it is very intriguing. NASA has discovered a very dark spot on Mars that could be an entrance to a deep hole or cavern.

The geological oddity measures some 330 feet (100 meters) across and is located on an otherwise bright dusty lava plain to the northeast of Arsia Mons, one of the four giant Tharsis volcanoes on the red planet.

The hole might be the sort of place that could support life or serve as a habitat for future astronauts, researchers speculated.