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The Hubble Tension is one of the great mysteries of cosmology. Solving it might require a fundamental change in how we understand the universe – but scientists have to prove it actually exists first. A new paper from a collective of…

On the concrete floor of a greenhouse in rural Kansas stands a neat grid of 100 plastic plant pots, each holding a straggly crown of strappy, grass-like leaves. These plants are perennials – they keep growing, year after year. That single…