Magnetic carbon In 2001, Tatiana Makarova and her co-authors published a paper (Nature 2001, 413, 716) claiming to observe ferromagnetism in ‘pressed’ buckminsterfullerene (C60). This goes against all theories of magnetism, as carbon does not normally possess the required features for this property. The paper was later retracted, against the wishes of Makarova… Who is at fault? What is the responsibility of co-authors?