Researchers at the Universidad de Navarra made an unexpected discovery while studying behavior in lines during the pandemic. They had been observing how people maintain a safe distance and react to movements in the line. The team found something unrelated to their initial focus, which has sparked interest in human behavior.

Further details about this finding are available from the source. It appears that the discovery is related to a common tendency in humans, but specifics are not provided here. For more information, readers can consult the original report from El País.