Encyclopedia > Facial expression

  Search Encyclopedia

Search over one million articles, find something about almost anything!
 
 
  
  Featured Article
Photosynthesis

... hydrogen with which to reduce carbon dioxide into carbohydrates. Van Neil's proposal was confirmed 20 years later by using the O18 isotope of oxygen as a tracer label t ...

 
 
 
This page was created in 27.4 ms