A team of researchers from the University of Chicago and Emory University has found evidence of a hydrogen bond/covalent bond hybrid. In their paper published in the journal Science, the group describes experiments they conducted with bifluoride ions that blurred the line between hydrogen bonds and covalent bonds. Mischa Bonn and Johannes Hunger with the Max Planck Institute for Polymer Research have published a Perspectives piece in the same journal issue outlining the work by the team on this new effort.