A team of researchers affiliated with multiple institutions in the Republic of Korea has developed a new way to use magnetic resonance imaging (MRI) for noninvasive tracking of the propagation of brain signals on millisecond timescales. In their paper published in the journal Science, the group describes how they developed the new technology, its features and how well it worked when tested on mice. Timo van Kerkoerle and Martijn Cloos with Université Paris-Saclay and the University of Queensland, respectively, have published a Perspectives piece in the same journal issue outlining the work done by the team on this new effort.