A closer look at “Earth’s Core Should Be Impossible. A New State of Matter Explains It.”, exactly as the source publishes it. Check Out Eons: And the full PBS Earth Month Playlist: The mysteries of our own planet’s interior have, in many ways, been harder to crack than those of the rest of the cosmos.
We can send probes to the edge of the solar system, and the 42 billion light years to the cosmic horizon are largely transparent—a big enough telescope can see the most distant galaxy. For the complete material, the listing points back to the source inside the network.