[RoadTest]

"Oldest light shows universe grew fast, researchers say [inflationary cosmology gets a big boost]"

Faster than you think. Seven days, in fact.

[snarks_when_bored]

Faster than I think? Seven days? That's faster than less than a trillionth of a second?

Have some coffee...(smile).

[JustDoItAlways]

I don't think you can use the afterglow radiation from the Big Bang to "show" inflation happened in trillionth trillionth of a second.

The "musing" in this article is just that "musing".

The conclusion one would have to come to is that after the first trillionth of a second, all matter and energy in the universe just sat around doing nothing for the next 300,000 years because it took that long for protons and neutrons to form and anti-matter to be annihilated after the big bang. That event is what the big bang afterglow is from.