While that is technically true I'm not sure it could actually be used to detect signs of life on other planets outside our solar system. The way they look for extrasolar planets is to look for very, very, almost imperceptible variation in the luminosity of stars caused by a planet orbiting between our line of sight and the star. The light planets radiate is so slight that it's washed out by the immense luminosity of the star it orbits. So I'm assuming although this method would work for planets in our solar system I'm not sure it would for extrasolar planets.mikozero said:jokes aside, there are, i think, various signatures they can detect now for planets which would suggest advanced life on it (via the gasses in the atmosphere affecting the light given off and certain things showing up in the spectrographic analysis)
possibly they have found one
Anyone remember that whole thing years ago about the rock from Mars that supposedly had, what was it, fossil evidence of bacteria or something? Not sure if it turned out it actually was or no but as I recall scientists had a good argument about whether it was actually life or not. I bet it's just something like that, I'll wait to get excited until they actually tell us what it is.