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Pseudo-copulation--an interaction that mimics sexual copulation--is a behavior known in mammalian communities that reduces aggression and signifies social dominance, particularly among males. However, ...

When no pseudo-copulation occurred between the dominant and subordinate males, the subordinate male was killed by the sustained aggression of the dominant in half of the animal pairs observed. Here ...

Using CT scans, researchers visualize the internal dynamics of sexual intercourse in marine mammals. The research sheds light on evolutionary forces and has practical applications for conservation ...

The planet’s first act of sex happened 385 million years ago between two prehistoric fish called pacoderms, according to new research by Australian paleontologist John Long published in the journal ...