He has a considerably high profile in ufology and has specialized himself in the investigation and study of alien abductions. He has already authored four major publications, conducted lectures and taken part in radio and television shows concerning alien abductions, since 1975 up to present. Professor Jacobs has already investigated approximately 1100 abduction cases and interviewed over 150 witnesses of the fourth kind. Studying alien abductions is already a great part of his life, and his research has leaded him to come up with incredible, but shocking conclusion.