SETI@home

You probably know all about the scientific experiment called "SETI@home" (Where SETI means "The Search for Extraterrestrial Intelligence").
They collect radio signals' data from the Arecibo Observatory's Radiotelescope (check here for more images) and, after, they analyse them, looking for an intelligent signal from the unknown space!
The great part of the story is that everbody can help them to do this hard work simply downloading a small free software (look at the screenshot below).

I stop here with the description because you can find all the information you need on their site.
I've joined the experiment few days ago and I'm really satisfied collaborating with this dreaming* project!

MH



* "Dreaming" means that SETI@home lets me dream about what's happening now in the unknown space.