The Bible says that God created man in his own image, and (let's not get into the Adam-God theory here, this is basically for the people who think it is this way) Genesis also implies life on other planets. So when the aliens come, are they going to look just like us? I mean, when the mothership comes down in a crowd of people, and we're all waiting to see little green men appear from out of the steam around the hatch, are we going to be disappointed to see some dude wearing jeans walk out? Wierd...