The light within: A rediscovery In the 1970s and 1980s, German physicist Fritz-Albert Popp conducted a series of controversial yet thought-provoking studies suggesting that living cells ...

Biophotons are extremely weak light particles emitted by all living cells. They're thousands of times weaker than the light from a firefly and invisible to the naked eye, yet they appear to be ...

Remarkably, UPE imaging captured individual photons in the visible band of light, according to Science Alert. Into their first hour of death, these so-called “biophotons” faded.

In a phenomenon scientists refer to as ultraweak photon emissions (UPEs), living tissues emit a continuous stream of low-intensity light, or biophotons.

Ultraweak biophotons largely caused by metabolic processes could play a key role in noninvasive health testing. By Darren Orf Published: May 13, 2025 8:00 AM EDT ...

Biophotons: A Reflection of Tissue Health In addition to tests on rodents, the researchers also investigated plants. When leaves were injured or exposed to substances such as benzocaine, light ...