enigma

However, there are still many enigmas about the molecular mechanisms that would explain the anomalies that make the water molecule unique.

Described by some as an “enigma”, Mrs Trump has preferred to be less public than her predecessors, giving fewer speeches both in the White House and on the campaign trail.

For all his hate, misogyny and political lies, I have to admit, I am fascinated by Vance and the enigma he is.

Yet, time and again over the past few decades, Rekha has proved that the air of enigma surrounding her has only left audiences wanting more.

Under the rules, the finder has to show that they correctly solved the enigmas and did not just stumble upon the owl by chance.