How polarization will eventually enable us to find life elsewhere in the universe

It is very likely that life has developed on some of the billions of planets that exist in our Milky Way galaxy. This life is not necessarily intelligent, but may rather look like moss or bacteria, and will therefore be hard to see. However, it will likely consist of complex molecules that convert starlight into energy. Such molecules leave a small but distinct circular polarization imprint on this light, which constitutes one of the very few ways to detect life remotely.