17th & 18th SETI Articles

Tony Lucas walks through a typical abduction in the article "Night Visitors and Alien Abductions".  Lucas says that victims typically see a beaming light into their window while they are sleeping. They are awake but cannot move and the aliens are usually at the foot of their bed. The aliens are constantly reassuring the victim that what they are doing is for the greater good. They take the victim into their spacecraft and run tests. More than not, the victim has to do something dealing with reproducing. Many victims have claimed to see half alien-half human babies on the spacecraft. The aliens then return the human back to where they found them. The abductee doesn't remember any of the majority of the events until weeks or months later, but has unexplainable bruises or scars. 

Someone asked the question "What do aliens look like?" at abduct.com. The person who answered said that aliens do not look like what they do in Hollywood movies or TV. Aliens have been reported from abductees to anywhere from 3 inches to 15 feet tall. Some of them resemble humans in some sense, others are just balls of light. Aliens can also look like large praying mantises. Their skin type as well as color have been documented all over the spectrum. Basically, an alien can look like anything according to this answer.