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What was it like at the beginning of the Big Bang?

What was it like at the beginning of the Big Bang?

Some 13.8 billion years ago, the Universe became hot, dense, and filled with high-energy quanta all at once. Here’s what it was like.
Go to the profile of Ethan Siegel
Ethan Siegel
Ask Ethan: Why is there something instead of nothing?

Ask Ethan: Why is there something instead of nothing?

Perhaps the most remarkable fact about the Universe at all is simply that it, and everything in it, exists. But what’s the reason why?
Go to the profile of Ethan Siegel
Ethan Siegel
What was it like when cosmic inflation occurred?

What was it like when cosmic inflation occurred?

Cosmic inflation is the state that preceded and set up the hot Big Bang. Here’s what the Universe was like during that time period.
Go to the profile of Ethan Siegel
Ethan Siegel
Can technology save astronomy from light pollution?

Can technology save astronomy from light pollution?

With LEDs bringing brighter nighttime lighting than ever before, and thousands of new satellites polluting the skies, astronomy needs help.
Go to the profile of Ethan Siegel
Ethan Siegel
Harvard astronomer’s “alien spherules” are industrial pollutants

Harvard astronomer’s “alien spherules” are industrial pollutants

Finding alien technology on the seafloor would be truly incredible. This extraordinary claim, however, is debunked by the actual evidence.
Go to the profile of Ethan Siegel
Ethan Siegel
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