Credit: The Journal of Physical Chemistry Letters (2025). DOI: 10.1021/acs.jpclett.4c03546 The light of someone's life might not be just another person, but light in the literal sense. According to a recent study by researchers from University of Calgary, every living system emits light without requiring external excitation due to a biological phenomenon known as ultraweak photon emission (UPE). In mice, UPE was linked to vitality as live mice emitted significantly higher UPE intensity compared ...