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A giant Black Hole is discovered
A giant Black Hole, one billion times the mass of the Sun, has been identified, surrounded by six galaxies, in a kind of cosmic grid dating back to the dawn of the universe.
Earth has a new "heart", formed 1 billion years ago
The earth has a new "heart." The inner core, made of solid iron, must have formed between 1 and 1.3 billion years ago (when the Planet itself was more than 3 billion years old), making its magnetic field even stronger.
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