In circularly polarised light, the electric field direction rotates as the wave passes, rather than oscillating from side to side. This means that the wave is effectively helical, and is therefore mirror asymmetric like the chiral molecules we suggest it may be acting on. Dr Bailey also said in a press release that thick dust clouds prohibited observations at Ultraviolet wavelengths. So we made the observations at infrared wavelengths. Our calculations, however, show that circular polarisation is present at all wavelengths, from infrared to ultraviolet.
Many scientists believe that the origin of life required molecular handedness.
Therefore life may have evolved here because of the environment in which the solar system formed, and not only due to the favourable environmental characteristics of early Earth.