christian-science
Explanation
The Joke
An older professor-like figure delivers a lecture in which he attempts to apply rigorous physical reasoning to the miracles of Jesus. He begins by noting that Jesus was buoyant enough to ascend into the heavens, but also walked on land most of the time, which suggests he carried something to weigh him down. He then reasons that since Jesus walked on water, he was buoyant enough not to sink but not buoyant enough to float in the air. The professor concludes that Jesus must have used miraculous fish and bread (referencing the miracle of the loaves and fishes) as an internal density-adjustment system, like a swim bladder, allowing him to control his buoyancy. He further claims that the Resurrection (rising after three days) was caused by gas buildup from fish putrefaction.
A student asks whether "theo-physics" is a real field or if the professor is just a crazy old man with tenure. The professor deflects, saying that question is a matter for "philosophers of theo-physics."
The Humor
The humor lies in the absurdity of applying the scientific method to biblical miracles as though they were observable physical phenomena requiring a mechanistic explanation. The professor treats the Ascension, walking on water, the loaves and fishes, and the Resurrection as data points in a coherent physical theory, arriving at a conclusion that is both internally logical and completely ridiculous -- that Jesus used fish and bread as a biological swim bladder. The final panel lands the joke perfectly: when challenged on whether this is a real academic discipline, the professor dodges the question by referring it to an even more absurd sub-field, "philosophers of theo-physics," mirroring how real academics sometimes deflect foundational criticisms of their field by saying it belongs to the philosophy of that field.
References
The comic references several miracles from the New Testament: the Ascension of Jesus (Acts 1:9), walking on water (Matthew 14:22-33), the multiplication of loaves and fishes (Matthew 14:13-21), and the Resurrection (multiple Gospels). The term "theo-physics" is a portmanteau of theology and physics. The concept of a swim bladder -- a gas-filled organ that fish use to control their buoyancy -- is a real biological structure. The joke about tenure references the common observation that tenured professors sometimes pursue highly eccentric research because they have job security.