Rare plutonium from space found in deep-sea crust - The Independent
- Rare plutonium from space found in deep-sea crust The Independent
- 'Alien' plutonium crashed to Earth millions of years ago found on ocean floor Daily Star
- Story is complicated: Discovery of rare radioactive plutonium isotope stuns scientists Republic World
- Plutonium-244 discovered in the Earth’s crust deep under the ocean SlashGear
- 'Alien' plutonium isotopes that date back millions of years discovered at the bottom of the ocean Daily Mail
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