The doubts that persist about Novak Djokovic's mental and physical fitness at this US Open are no less intact after Thursday's quarter-final win over Jo-Wilfried Tsonga, but at the present rate it's unclear how much they will matter.
In making the film I had set out to bust a lot of the myths and stereotypes that persist about coding.
Late last year, the company told its suppliers that its accounts payable system was broken, a problem that persisted for about six weeks.
An exception was an ocean connection between the Pacific and Caribbean Sea in Central America that persisted until about three million years ago.
In Florida, the depression was forecast to ease drought conditions that persisted for about two years.
Elser and a handful of colleagues at Arizona State University founded the Sustainable Phosphorus Initiative to raise awareness of the questions that persist about the long-term supply of this commodity.
But the manufacturers of the Gona River trove had learned how to fashion tools with sharp edges--a hallmark of the Oldowan style that persisted with little change until about 1.6 million years ago.
Mr. Ballew said that questions persisted about how much of the proposal would pass.
The proteins act as antigens, which, when introduced into the elephant, produce antibodies that persist for about a year.
