Astronomy Picture of the day : holes in mars - ntype - 05-28-2007
http://antwrp.gsfc.nasa.gov/apod/ap070528.html
Black spots have been discovered on Mars that are so dark that nothing inside can be seen. Quite possibly, the spots are entrances to deep underground caves capable of protecting Martian life, were it to exist.
The unusual hole pictured above was found on the slopes of the giant Martian volcano Arsia Mons. The attached image was captured three weeks ago by the HiRISE instrument onboard the Mars Reconnaissance Orbiter currently circling Mars.
The holes were originally identified on lower resolution images from the Mars Odyssey spacecraft,
The pictured hole is about the size of a football field and is so deep that it is completely unilluminated by the Sun. Such holes and underground caves might be prime targets for future spacecraft, robots, and even the next generation of human interplanetary explorers.
Astronomy Picture of the day : holes in mars -
Flumper Barflusterbutt - 05-29-2007
shopped.
Astronomy Picture of the day : holes in mars -
BIRD33 - 05-29-2007
Can't wait for 60 billion to be spent sending a space craft to check out a cave.