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POPSNew twist to matter-antimatter mystery Here is an "almost breakthrough" A major mystery of modern physics is why normal matter particles are the building blocks of the observable universe. Why are we not made of antimatter? Or pure energy? Scientists speculate that a tiny imbalance in the early universe allowed a small fraction of normal matter – one particle for every one billion – to avoid annihilation and survive to form stars, planets, and humans. When we come to know that we don't know, there is a new place for hope...
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POPSDark energy a furphy says new paper Dark energy does seem like the 'unknown unknown' that exists purely to balance equations. Trying to make the universe fit our picture, rather than the other way around. If they want to call it anything but an illusion, they have to find a way to measure it independently, or fix their theories. The most significant feature of dark energy so far has been, that they're not sure if it's there or not.
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POPSWeird dark stars dotted early universe Quasars usually need the mass of a galaxy to form, and astronomers have been unable to explain how some quasars seemed to appear before galaxies had formed to make them. These 'dark stars' provide a means by which this may have happened.
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POPSWhere is it? Some say it's in a halo around galaxies. Now it maybe within galaxies themselves.
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