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KNOWN UNIVERSE

The Big Bang

13.7 billion years ago, our universe started with a colossal explosion called the big bang. That powerful blast created all the matter in the universe and laid the groundwork for every explosion since.

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Field Trip Oakland Zoo with Lynn Rothschild

Lynn Rothschild takes us on a field trip to the Oakland Zoo to discuss the diversity of life on o...
(03:08)
LIGO's Joseph Giaime

Joseph Giaime discusses how LIGO (Laser Interferometer Gravitational Wave Observatory) works.
(03:08)
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