Astronomers are rethinking one of cosmology’s biggest mysteries: dark energy. New findings show that evolving dark energy models, tied to ultra-light axion particles, may better fit the universe’s ...
How do we know the speed of light – and why does it have a speed limit at all? Leah Crane explores the history of one of the ...
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Dark matter obeys gravity after all — could that rule out a 5th fundamental force in the universe?
Scientists have discovered that dark matter, the universe's most mysterious "stuff," obeys gravity on vast cosmological scales. This could help to dismiss the possibility of a fifth fundamental force ...
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