Why is vein green?
The blue of veins is visible due to the interaction of light with the skin, the amount of oxygen in the blood and other factors.
Latest update
-
Do signals from extraterrestrial civilizations detected by Sky Eye really exist?
-
'City without air conditioning' in China: People don't know what heat is!
-
The element of the sun god is giving scientists a headache
-
Unique Village: Roofs Become Roads for Residents!
-
Top 7 strange psychological effects of the brain that we all have without knowing
-
Which is the most terrifying bedroom elixir in Chinese history?
-
Earth's core may start rotating in reverse
-
A day in Japan can be up to 30 hours long, does this country live in a different 'timeline'?