The remarkable story of 10 y.o. Jo Nagai from Japan who conducted groundbreaking research on swallowtail butterflies (0:23). Jo documented unique behaviors and eventually challenged the scientific belief that metamorphosis completely resets an insect's brain (1:42-2:52).
The Experiment and Results:
Memory Persistence: Jo replicated a study by entomologist Martha Weiss, demonstrating that swallowtail butterflies retain memories formed as caterpillars. By associating a lavender scent with a mild shock, Jo showed that 70% of the trained butterflies avoided that scent as adults (5:25-7:56).
Transgenerational Memory: Jo later discovered that the offspring and grandchildren of these trained butterflies also avoided the lavender scent, despite never being trained themselves. This suggests that learned behaviors might alter biology and be passed down to future generations (9:00-11:00).
