These are pressing, unsolved questions.
How birds orient themselves during migration remains the greatest of the unsolved questions in all avian studies.
There is just enough tantalising information, then, from which to weave a good tale; and plenty of intriguingly unsolved questions for the playwright to answer.
"Even if there are still loose ends and unsolved questions, yesterday's summit was an important step in the right direction," said Carsten Brzeski, an economist with ING in Brussels, said in a research note.
Neave's link with the intelligence services, originating with his wartime role in MI9, is seen as relevant to the unsolved questions about his death - who killed him, how was he avenged, why has no one been prosecuted for his murder?
Unsolved questions are listed for future research.
Thus, many unsolved questions and new challenges are still remaining.
Describe the state of the field, then build drama by revealing unsolved questions.
With these discoveries, it has become necessary to investigate a series of unsolved questions.
These unsolved questions need to be answered with experimental models and advanced technology.
However, there exist many unsolved questions in developing an efficient camera handoff algorithm.
