Year 312 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Corvus and Mus (or, less frequently, year 442 Ab urbe condita). The denomination 312 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
The "Marines' Hymn" is the official hymn of the United States Marine Corps. It is the oldest official song in the United States military. The "Marines' Hymn" is typically sung at the position of attention as a gesture of respect. However, the third verse is also used as a toast during formal events, such as the birthday ball and other ceremonies.
The Edible Frog (Pelophylax kl. esculentus) is a name for a common European frog, also known as the common water frog or green frog (however, this latter term is also used for the North American species Lithobates clamitans). It is used for food, particularly in France for the delicacy frogs' legs. Females are between 5 to 9 cm long, males between 6 to 11 cm.
Streptococcus pneumoniae, or pneumococcus, is gram-positive, alpha-hemolytic, bile soluble aerotolerant anaerobe and a member of the genus Streptococcus. A significant human pathogenic bacterium, S. pneumoniae was recognized as a major cause of pneumonia in the late 19th century and is the subject of many humoral immunity studies.