#16: Venus & Alien Biosignatures | Detecting Alien Microbes in our Solar System and Beyond

<p>With last week's announcement of possible biosignatures of life detected in the cloud layers of Venus, we look at how science would be able to detect these alien biological signals using existing methods and technology. Can we legitimately detect the signs of life on the surface or in the atmospheres of our nearest neighbors and on extrasolar planets?</p>