Professor, genetic materials is unique to this planet they might want,(reply>), @Tac Tical .... Naaah.... what hurts humans most ...<br><br>Is to not accept that they would be WORTHLESS in eyes of the ALIENS,(reply>), @Alexiully perhaps they're collecting a gene pools,(reply>), They can just send a probe or sample a few of the main categories, bacteria, fung, plants, animals and have all the material they need for whatever reason,(reply>), For what purpose?