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Arno Penzias: Nobel laureate who co-discovered ‘echo of Big Bang’ dies aged 90

23 Jan 2024 Michael Banks
Arno Penzias and Robert Wilson
Cosmic pioneers: Arno Penzias (left) and Robert Wilson discovered the cosmic microwave background in the 1960s (Courtesy: AIP Emilio Segrè Visual Archives, Physics Today Collection)
The cosmologist Arno Penzias, who discovered the cosmic microwave background (CMB) with Robert Wilso

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