Health scientists are becoming more and more interested in the citrulline content of watermelon. Citrulline is an amino acid that is commonly converted by our kidneys and other organ systems into arginine (another amino acid). The flesh of a watermelon contains about 250 millligrams of citrulline per cup.
The Julian day or Julian day number (JDN) is the number of days that have passed since the initial epoch defined as noon Universal Time (UT) Monday, January 1, 4713 BC in the Julian calendar. That noon-to-noon day is counted as Julian day 0. Thus the multiples of 7 are Mondays.
The history of leap year. When Julius Caesar introduced the Julian calendar in 46 BC, it had 365 days with 366 every fourth year. That calendar, however, gave February 30 days and August 29. Under Julius Caesar, February had 30 days and the month named after him - July - had 31.