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Watch: Gravitational waves explained

Scientists announced Thursday that, after decades of effort, they have succeeded in detecting gravitational waves from the violent merging of two black holes in deep space.

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Penfolds Victoria Derby Day 2024
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Penfolds Victoria Derby Day 2024

Keeper of the Lexus Melbourne Cup, Joe McGrath speaks about the history of the event and what draws the crowd to the Melbourne Cup Carnival every year. Video / Alyse Wright