I am sure some here will enjoy this story... Don't know how credible this
individual's work is though...

Strange! Humans Glow in Visible Light

Charles Q. Choi
Special to LiveScience
1 hr 47 mins ago

The human body literally glows, emitting a visible light in extremely small
quantities at levels that rise and fall with the day, scientists now reveal.

Past research has shown that the body emits visible light, 1,000 times less
intense than the levels to which our naked eyes are sensitive. In fact,
virtually all living creatures emit very weak light, which is thought to be a
byproduct of biochemical reactions involving free radicals.

(This visible light differs from the infrared radiation - an invisible form of
light - that comes from body heat.)

To learn more about this faint visible light, scientists in Japan employed
extraordinarily sensitive cameras capable of detecting single photons. Five
healthy male volunteers in their 20s were placed bare-chested in front of the
cameras in complete darkness in light-tight rooms for 20 minutes every three
hours from 10 a.m. to 10 p.m. for three days.

The researchers found the body glow rose and fell over the day, with its lowest
point at 10 a.m. and its peak at 4 p.m., dropping gradually after that. These
findings suggest there is light emission linked to our body clocks, most likely
due to how our metabolic rhythms fluctuate over the course of the day.

Faces glowed more than the rest of the body. This might be because faces are
more tanned than the rest of the body, since they get more exposure to sunlight
- the pigment behind skin color, melanin, has fluorescent components that could
enhance the body's miniscule light production.

Since this faint light is linked with the body's metabolism, this finding
suggests cameras that can spot the weak emissions could help spot medical
conditions, said researcher Hitoshi Okamura, a circadian biologist at Kyoto
University in Japan.

"If you can see the glimmer from the body's surface, you could see the whole
body condition," said researcher Masaki Kobayashi, a biomedical photonics
specialist at the Tohoku Institute of Technology in Sendai, Japan.

The scientists detailed their findings online July 16 in the journal PLoS ONE.

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