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PBS Space Time
Dark Energy Is Driving the Universe Apart. We May Finally Know Why.
The universe expands faster. “Dark energy” may not be constant after all.
Earth’s Core Should Be Impossible. A New State of Matter Explains It.
PBS Space Time explores the outer reaches of space, the craziness of astrophysics, the possibilities of sci-fi, and anything else you can think of beyond Planet Earth. Host Matt O'Dowd breaks down both the basic and incredibly complex sides of space and time.
Earth’s Core Should Be Impossible. A New State of Matter Explains It.
Season 11 Episode 26 | 16m 16s | CC
Is Earth's core solid or liquid? Yes. Our planet's interior has been harder to study than the cosmos. We can send probes to the solar system's edge, and telescopes can see the most distant galaxies—but the 6,400km to Earth's center are opaque to light and beyond any drill. Our best tool is listening to distant earthquakes and piecing together how seismic waves bounce through the interior.
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