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Dr Lee Townsend, an astronomer at UCT, tells us about the merry dance going on in the universe revealing the strange and extreme physics of binary systems, where one dense neutron star sucks the living daylights out of its companion. Sometimes these binaries end up as black holes, and other strange couplings, outputting unimaginable energies when they merge, collapse, explode, and all the other violent things that can go bump in the night.