Spirit Rover landed on Mars on January 4, 2004 and explored the planet's surface, gathering geological and geographical data. It functioned longer than NASA expected but got stuck in late 2009, sending its last communication to NASA on March 22, 2010. El Dorado, a famous hill, mentioned in the clues is not on Earth and was photographed from Mars by the Spirit Rover during its exploration of the planet's surface between 2004 and 2010.

1. A Google A Day

2. Science

3. Science
El Dorado is near a famous
hill that's not on Earth.
What year was
it photographed?

4. Hints
Things to think about as you get started
1 Do you know what El Dorado is?
2 Where do you think El Dorado might be?
3 What would it mean to be "not on Earth?"

5. Background and further
discussion
NASA's Spirit Rover landed
on Mars on January 4, 2004,
and proceeded to explore
and gather data for analyses
of the geology and geography
of the planet's surface.
Functioning much longer than
NASA had expected,
it got stuck in late 2009,
and sent its last
communication back
to NASA on March 22, 2010.