universes

Scientists may have finally solved the problem of the universe’s ‘missing’ black holes

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A black hole is so compact that nothing can escape its gravitational pull, not even light.

The early universe contained far fewer miniatures black holes than previously thought, making the origin of our cosmos’ missing matter an even greater mystery, a new study suggests. Miniature or primordial black holes (PBHs) are black holes thought to have formed in the first fractions of a second after the Big Bang. According to leading … Read more

The universe’s biggest explosions made some of the elements we are made of. But there is another source of mystery there

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After its “birth” in the Big Bang, the universe consisted mostly of hydrogen and a few helium atoms. These are the lightest elements on the periodic table. More or less all elements heavier than helium were produced in the 13.8 billion years between the Big Bang and the present day. Stars have produced many of … Read more