Prof Alan Heavens F.R.S.E Imperial Collage London

Astronomers have a very successful model of the Universe – the so-called Lambda CDM Universe,

containing ordinary matter, radiation, dark matter and dark energy.

It fits almost everything very nicely, but there
is one fly in the ointment: what we see from the early Universe predicts
how fast the Universe should be expanding today (the “Hubble Constant”),
but recent measurements indicate that it’s actually expanding a bit faster
than that, by nearly 10 percent. Is it a mistake, or does it tell us that
we don’t understand the Universe after all, and some new physics must come
into play?

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