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Nature 412, 757 (23 August 2001) | doi:10.1038/35090713

Flickering light raises possibility of changing 'constant'

David Adam

Physicists have reacted with curiosity and scepticism to suggestions that one of the fundamental constants of their discipline may not be so constant after all.An international team, led by astrophysicist John Webb of the University of New South Wales in Sydney, made the claims after analysing light from bright, distant objects known as quasars.