Exactly every 8 years, these millipedes block the tracks in Japan. Why is this happening?
Every 8 years, tracks in Japan are literally blocked by the invasion of millipedes, which have even been nicknamed "train" for this reason. Working together, these small creatures (about 3 cm long), which play a huge role in the nitrogen cycle in the local larch forests, simply make the trains stop. Until now, however, scientists were not sure what causes such behavior and why it occurs with such regularity - after 50 years of research, we finally got to know the answer, namely Parafontaria laminata armigera, because this is the species we are talking about, characterized by an exceptional 8-year cycle life. This is an extremely exciting discovery for the scientific community, because so far the only known perennial species with such a long life cycle were perennial cicadas.