It is the only known instance of tool use by dolphins in the wild.
This, if confirmed, would be the most recent known instance of human evolution.
In rare cases, family members have been able to retrieve a body, but the report noted that in each known instance it "bore marks of extensive torture".
Prior to this year, the only known instance of a monk setting himself on fire in recent times occurred at Kirti in Feb. 2009.
This is the first known instance in which greatness in literature is ascribed to qualities innate in the writer rather than his art.
From parish records in a French-Canadian island, researchers have uncovered what may be the most recent known instance of human evolution in response to natural selection.
The clandestine intelligence-gathering effort is the most detailed known instance of the limited American support for the military campaign against the Syrian government.
"This is the first known instance for deliberate planning, production and curation of a compound," Christopher Henshilwood at the University of Bergen told Science, adding that the finding also marked the first known use of containers.
Finally, there was the long and complex relationship between Wagner and Nietzsche, the only known instance of a profound friendship between a great composer and a great philosopher, Mr. Magee argues.
We did see it coming: the three-blade razor may be the first known instance in the history of capitalism of a product mocked long in advance of its invention.
A contemporary, Professor Frederik Christian Sibbern, recorded rumors of epilepsy, and in one known instance Kierkegaard abruptly fell down, but the most provocative clue is the hospital notation that the patient used Valeriana officinalis.
