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Can Dogs Talk? Preview
Do speech buttons really allow dogs to talk to us? Scientists investigate.
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Asteroids: Spark of Life?
What if violent asteroid impacts actually jump-started life on Earth? Explore a dramatic theory.
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Angkor: Hidden Jungle Empire Preview
New evidence sheds light on the remarkable life—and mysterious collapse—of the ancient jungle city.
NOVA
Asteroids: Spark of Life? Preview
What if violent asteroid impacts actually jump-started life on Earth? Explore a dramatic theory.
NOVA
Interview: Discovering Dark Energy and the Hubble Tension with Nobel Prize Winner Adam Riess
Adam Riess takes us inside the discovery of dark energy.