As a hypnotherapist and psychic reader, I have worked with many alleged alien abductees, who claim to have had physical experiments performed on them. Physical evidence on the body often includes scoop marks on the body particularly on the legs, scratches, radiation burns, incision marks, or a series of red dots or triangles. Also -- Removing Alien Fetuses ~ Hybrid Children

A significant breakthrough in the search for trace physical evidence of alien abductions may have been uncovered in ordinary household dust. According to biophysicist Dr. William C. Levengood of Pinelandia Biophysics Laboratory of Michigan, microscopic "glassy particles" have been found in household dust of individuals claiming to be abductees. "Glassy particles" have been found in bedrooms, kitchens, family rooms, hallways, basement stairs, and so on. "Glassy particles" have not been found in dust where abductions are not known to occur. The "glassy particles" come in a variety of shapes, including hollow or solid spheres. The particles are occasionally amber in color and vary in size from 1 micron or more, which is 1/1,000 of a millimeter. Other more elongated particles include the "pseudo crystal." These forms are often clear and contain definite non-cellular, non-plant structure. A visual inspection of the "pseudo crystals" under 450x magnification gives the appearance of a fiber optic arrangement. Household dust is best collected from areas not commonly dusted, such as the top ledges of doors and window frames. Unexplainable whitish dust in recently cleaned rooms of abductees' homes has also tested positive for these glassy particles. While abductees' homes have produced two or more styles of particles, no abductee's home to date has produced all styles of particles.

Physical evidence has not has yet been brought to the public. Some people set up infra-red cameras to get proof, yet something always seems to go wrong with the equipment or the proof has been hidden.