Ask Your Car GASOLINE brands may be mysterious, but the difference in grades of gasoline -- between regular and whatever kinds of premium a station offers -- is straightforward.
In fact, 12,000 years of civilisation can be charted through the engravings and delicate rock paintings of the area: the slow march of climate change, the shift from hunting to pastoral pursuits, tribal differences, mysterious religious ceremonies, the introduction of the horse and finally, as the desert encroached, the camel.
The causes of this difference are mysterious, hence the term 'the productivity puzzle' [6], [7].
In many cases, however, the functions of neural sex differences are mysterious.
These mysteries remain mysterious.
It's a bracing reminder that in all sport confidence is the mysterious ingredient that makes the difference.
In Mr. Tompkins's time, the difference between the mysterious quantum realm and the hard-edged world of everyday life was assumed to be simply a matter of size.
The Islamic State's strict secrecy, which has allowed its leadership to remain so mysterious, has led to some differences among American and other Western analysts on the degree to which Mr. Baghdadi is in charge and whether the main power in the organization rests with his allies, including several of the former Baathist officers.
The factors behind those national differences are, for now, mysterious.
They never reconciled their differences and, after Poe's mysterious death in 1849, Griswold wrote an unsympathetic obituary.
