How do we know universe is expanding? Why do we believe it began in
a Big Bang? What will be the ultimate fate of the universe? Take a tour through all the changes the universe has undergone in the 13.7 billion years since its birth, and how the Cosmic Microwave Background helps us connect the universe in its infancy to the universe today.

Athena is an astronomy graduate student at UT Austin. She runscomputer simulations to see what the universe looked looked likeduring its first billion years, and is specially interested in howthe ancient stars and galaxies of these early times compares to young objects like our Sun and Milky Way.

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