Dr. Richardson theorizes that some unknown force lowered the temperatures of the objects so as to lower the Earth's gravitational pull, thus making the objects easier to lift, regardless of their size and weight. Katsumiya determines that such an action could only be accomplished by a force beyond the Earth.
Dr. Richardson posits that an unidentified force lowered the temperature of the objects, which in turn diminished Earth's gravitational effect, thus simplifying the lifting process for any object regardless of its size and weight. Katsumiya deduces that this action could only be performed by a force beyond what Earth can produce.