After a 49-million-year hiatus, a cockroach has reappeared in North America. This particular cockroach has been thought to be solely Old World and has a long-standing fossil record in Europe. However, new evidence reveals its origins may be rooted in the New World. Four ancient species of this cockroach were found in Baltic amber deposits in Colorado’s Green River Formation. Researchers aren’t sure why this particular cockroach became extinct in the New World but thrived in the Old World.