Scientists uncover a signal sent out by the first stars in the universe

For millions of years after the Big Bang, the universe was a cold place filled with hydrogen and helium created at the dawn of the universe. 

And then, suddenly, there was light.

For the first time, a team of astronomers think they've detected a signal from some of the first stars that formed less than 180 million years after the Big Bang. 

Two new studies published in the journal Nature this week detail new evidence about when those stars formed after the Big Bang. 

SEE ALSO: Mysterious cosmic radio burst spotted in real time from Australia

The new work also opens up questions about those early eons after the universe came to be, and may even reveal cracks in our understanding of physics.  Read more...

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