Sentence examples for was first observed from inspiring English sources

Such behaviour was first observed in 2013.

(The holiday was first observed in 1986).

REM Sleep was first observed in Apr.

Bleaching was first observed in 1983.

Superconductivity was first observed in mercury in 1911.

The holiday was first observed on Jan . 20 , 1986

And synchronization was first observed not among creatures but among clocks.

The asteroid Apophis, named after the Egyptian god Apep the Destroyer, was first observed in 2004.

The date when the season was first observed is uncertain.

Since 1946 when this segregation was first observed, scientists tried and failed to explain it.

White Nose Syndrome was first observed in upstate New York in the winter of 2006.