'unknown nature' can be used in written English.
For example: It is difficult to comprehend the unknown nature of the universe.
He called it X-radiation to denote its unknown nature.
Or perhaps yet another cosmic disaster of an unknown nature.
She is however sanguine about the "unknown" nature of the outcome of the EU referendum.
The influence of an energy force of unknown nature could have speeded up cosmic expansion by now.
The second DSC completely unfolded polymers with transition temperatures between 50°C and 90°C, and polymers with unknown nature persists the reversible transformation at 123°C.
Yet between 2007 and 2012 the court did order changes of an unknown nature to 428 of the 532 requests it received for the collection of business records.
The acceleration of the universe was a startling result that completely changed cosmology; the majority of the universe's mass-energy was of a completely unknown nature.
"Due to the unknown nature of building an airport on the island's uneven terrain, changes in design had to be made to facilitate that," she said.
Dr. Tomasko said further studies in the next weeks may explain the unknown nature of the dark regions that could be lakes or just flat surfaces of dark material.
Our assumptions regarding the amount of space within each unit reserved for the actual qubits and necessary control infrastructure are somewhat arbitrary due to the unknown nature of how classical control technology will develop.
Yet their discoveries from planets around other stars that may support alien life, to dark matter and energy of unknown nature that are the dominant stuff of reality are no less world-changing than his.
