Anura is divided into three suborders which are broadly accepted by the scientific community but the relationships between some families remains unclear.

With the availability of primary sources, such as the those in Nag Hammadi library, the identity of Abrasax remains unclear.

To what extent Snorri's presentation is poetic creation only remains unclear.

His exact date of death remains unclear as well, with most research pointing toward it being between April 14, 1202, and April 5, 1203.

The legal process required at the federal level remains unclear.

How indigenous peoples discovered the synergistic properties of the plants used in the ayahuasca brew remains unclear.

It remains therefore unclear where exactly the Central European origins of the Boii lay, if somewhere in Gaul, Southern Germany or in Bohemia.

Hence it remains unclear why any of it is conscious.

The exact taxonomic placement of New World Vultures remains unclear.

As such, it remains unclear if knuckle cracking is in itself associated with any impaired hand function.

It remains unclear if Paul was even himself married.

It remains unclear when, why, and by whom the earliest dolmens were made.

Since these canids are called dholes only in English, the etymology remains unclear, but it may have come from (‘ wolf ’).

Their relationship to the Asfarviridae and the Myoviridae was not examined and remains unclear.

Nevertheless, their relationship with all other Orthodox Churches remains unclear, as ' Orthodox ' Churches normally recognize and are recognized by others.

Whether Shakespeare took these from Belleforest directly or through the Ur-Hamlet remains unclear.

Nevertheless the immense acceleration process that occurs during hyperinflation ( such as during the German hyperinflation of 1922 / 23 ) still remains unclear and unpredictable.

Gutenberg's technique of making movable type remains unclear.

Although the exact nature and extent of the Christian redaction remains unclear there is broad consensus as to what the original text of the Testimonium by Josephus would have looked like.

It is currently unclear whether 21, 000-year-old campfire remains found in the Valley of Mexico are the earliest human remains uncovered so far in Mexico.

Instead, in yeast, it has been shown to be dependent on a multiprotein tethering structure termed the ER-mitochondria encounter structure, or ERMES, although it remains unclear whether this structure directly mediates lipid transfer or is required to keep the membranes in sufficiently close proximity to lower the energy barrier for lipid flipping.

Despite extensive research into the interaction of modafinil with a large number of neurotransmitter systems, a precise mechanism or set of mechanisms of action remains unclear.

The origin of the river's name remains unclear.

This showed that common sense had not died out at the county and village level -- though why the unhappy and obviously unbalanced woman was not restrained remains a puzzle.

The perplexing question still remains as to why the middle classes turn to the churches as a vehicle of social identity when their clubs and charities should fill the same need.

In this situation, there are a number of strategic reasons why an individual player might select one hotel chain over another to be the one that remains on the board.

The main copper mineral chalcopyrite ( CuFeS < sub > 2 </ sub >) is not leached very efficiently, which is why the dominant copper-producing technology remains flotation, followed by smelting and refining.

Whilst the population remains small, the impact of transfers will be greater, it is for that reason that the establishment of a " metapopulation management plan " occurs concurrently with conservation initiatives to enhance in-situ population growth and why this initiative is both urgent and fundamental to the future survival of mountain bongo in the wild.

The large number of coaching inns is, in turn, one reason why the City has so many pubs today ( another being that it was, and remains, a major centre for Christian pilgrimage ).

It is in this broader sense that the Coandă effect is used by some to explain why the air flow remains attached to the top side of an airfoil.

Because it requires no battery or other source of energy, the magneto is a compact and reliable self-contained ignition system, which is why it remains in use in many general aviation applications.

Against the weight of historical evidence to the contrary, the question remains as to why the Pope Joan story has been popular and widely believed.

It remains unclear why this might be the case.

A counterpoint to the above is that while these considerations harmonize belief in God with our inability to identify his reasons for permitting evil, there remains a question as to why we have not been given a clear and unambiguous assurance by God that he has good reasons for allowing evil, which would be within our ability to understand.

Raleigh sent others to found the Roanoke Colony ; it remains a mystery why the settlers all disappeared.

Exactly why this deathbed surveillance was carried out remains unclear, and the surviving documentation is patchy.

Trevize remains uncertain as to why he has chosen Gaia as the correct outcome for the future.

However, the question remains why birds despite having very high core body temperatures have internal testes and did not evolve external testes.

Often there is a menacing outside force that remains a mystery ; in The Birthday Party, for example, Goldberg and McCann confront Stanley, torture him with absurd questions, and drag him off at the end, but it is never revealed why.

The question of how matter is different from antimatter remains an open problem, in order to explain how our universe survived the Big Bang and why so little antimatter exists today.

It still remains an unanswered question amongst Egyptologists as to why Bat survived as an independent goddess for so long.

When and why the name was changed to Sodom remains a mystery.

A question remains as to why there was no outbreak before the start of the current infestation.

It remains unexplained why, if this were the case, he would choose the busiest time of day on a busy street, nor why his shirt remained tucked in his trousers after death.