The logo represents an Ouroboros. The ouroboros or uroborus  is an ancient symbol depicting a serpent or dragon eating its own tail.
 

Via medieval alchemical tradition, the symbol entered Renaissance magic and modern symbolism, often taken to symbolize introspection, the eternal return or cyclicality, especially in the sense of something constantly re-creating itself. It also represents the infinite cycle of nature's endless creation and destruction, life and death.
 

The symbol is generally used as the "search for immortality" by alchemists and modern scientists.