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New giant ‘radio galaxies’ help shed light on the history of the universe The Conversation January 22, 2021, 2:00 AM Two giant radio galaxies have been discovered with South Africa’s powerful MeerKAT telescope, located in the Karoo region, a semi-arid area in the southwest of the country. Radio galaxies get their name from the fact that they release huge beams, or ‘jets’, of radio light. These happen through the interaction between charged particles and strong magnetic fields related to supermassive black holes at the galaxies’ hearts. These giant galaxies are much bigger than most of the others in the Universe and are thought to be quite rare. Although millions of radio galaxies are known to exist, only around 800 giants… ....