Found: Oldest Evidence for an Organismal Magnetic Compass
animals, bacteria, biology, biomineralization, Cambridge University, crystals, fossils, Intelligent Design, iron oxide, Life Sciences, magnetic compass, magnetic induction, magnetite, magnetofossils, magnetoreception, Max Planck Institute, organisms, quantum effects, radical pair theory, salmon, trout
The evidence exists in so-called magnetofossils found in marine sediments that have been dated to 97 million years old. Source