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Tiffany Kataria from NASA's Jet Propulsion Laboratory describes how scientists are discovering what elements exist in exoplanet atmospheres and how those elements might lead to life.
Astrophysicist Katherine Freese describes mysterious dark matter how she became interested in the subject.
What's the size of San Francisco, but has 1.5 times the mass of our sun? Dr. Shami Chatterjee has the answer!
Dr. Travis Rector talks about the process and result of photographing the cosmos.
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