[escepticos] Pedruscos marcianos

[Miguel Angel]

Los misterios de Marte:

http://apod.nasa.gov/apod/ap140129.html

What if a rock that looked like a jelly donut suddenly appeared on Mars?
That's just what happened in front of the robotic Opportunity rover
currently exploring the red planet. The unexpectedly placed rock, pictured
above, was imaged recently by Opportunity after not appearing in other
images taken as recently as twelve Martian days (sols) before.

Miguel A