We know that true polar wander (TPW) can occasionally tilt whole planets and moons relative to their axes, but it's not entirely clear just how often this has happened to Earth. Now a new study presents evidence of one such tilting event that occurred around 84 million years ago – when dinosaurs still walked the Earth. Researchers analyzed limestone samples from Italy, dating back to the Late Cretaceous period (100.5 to 65.5 million years ago), looking for evidence of shifts in the magnetic record that would point towards an occurrence of TPW. Bacteria fossils trapped in the rock, forming chains...