A lot of what we know about the early universe comes from experiments done in giant ___

When the universe got its start, it was unfathomably ___

If you take a snowball and heat it up, it'll melt. We call that a ___

When you heat something up, what you're doing is giving it more ___

The basic particles of normal matter, which can't be subdivided any more, are ___

In the very early Universe the four basic forces we see today were all squeezed together into ___

If we call the instant of the Big Bang "time zero", then our physics cannot describe what happens in the first ___

Three minutes after the Big Bang, the Universe cooled enough that the subatomic particles could ___

20 minutes after the Big Bang, the Universe cooled enough that ___

The primordial ratio was similar to the Sun's elemental abundance, which is roughly ___

Until the Universe was 380,000 years old, electrons couldn't bond with the atomic nuclei. The Universe was ___

After 380 millennia, the Universe cooled enough to form stable neutral atoms. We call this moment ___

When the Universe was still ionized, prior to recombination, it was ___

After recombination, the light emitted by the neutral atoms is what we see today as ___

The background glow predicted by the Big Bang model has been on its journey to Earth for almost ___

After recombination, matter in the early Universe was ___

Theoretical physicist Alan Guth proposed an addition to the Big Bang model; a super expansion called ___

The denser fluctuations in the background glow were seeds, where matter condensed into ___

How long ago did our own galaxy start as a quantum fluctuation in space?