The snake whose bite can send you back through puberty

The extent of damage of any snakebite depends on several factors, including how fast an antivenin is applied, but Russell's Viper victims often have significant damage to the gland. In a study published in The Lancet, about twenty-nine percent of patients who recovered from Russell's Viper venom had signs of hypopituitarism or Sheehan's Syndrome. Both conditions have unremarkable symptoms, like a constant feeling of cold and an unusual amount of fatigue. What distinguishes them is a sort of reverse-puberty in adults.