London, Jan 23: A new research has suggested that male guppies, which have invaded Mexican rivers and lakes, are sexually harassing females of another fish species to prevent them from reproducing.
Guppies, originally from Trinidad, invaded Mexican waters in the 1950s, a major reason being aquarium owners dumping these fish species into rivers.
According to a report in New Scientist, researchers think that the guppies may physically harm the native females so they are unable to reproduce with males of their own species – a way of suppressing their population.
London, Jan 23: A new study by astronomers has suggested that tiny black holes at the centre of our galaxy could be a possible source of the mysterious antimatter present in the Milky Way.
London, Jan.
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