The Dark Tetrad, also known as the Dark Quad, is a set of interrelated negative personality features: narcissism, psychopathy, Machiavellianism, and sadism. The term is an expansion of the idea of the ...

The blood moon is a rare splash of red in the night sky that gets stargazers excited. But according to some bonkers conspiracy theorists, four of them in a row is a sign of disastrous times ahead. The ...

Tetrad analysis has been a gold-standard genetic technique for several decades. Unfortunately, the need to manually isolate, disrupt and space tetrads has relegated its application to small-scale ...

North Americans could get a glimpse of the Earth shadowing the moon (very) early Saturday — the third in a series of four lunar eclipses that began nearly a year ago. But only those on the West Coast, ...