A new reagent discovered by research scientists at St George’s, University of London has shown real-time brain behaviour in more detail than ever before. An ultrafast sensor which binds to glutamate will allow scientists to visualise messaging at the synapses—which occurs on a millisecond timescale. Nerve cells communicate through synapses, which pass messages from one neuron to another via small molecules such as glutamate. (May 16, 2018)