Dark Energy as a Spring: A Model with No Tuning express
In the late 1990s, Saul Perlmutter, Adam Riess, and Brian Schmidt observed supernovae and found: the universe is expanding faster and faster. To explain it, we had to introduce dark energy — a mysterious force, like a tightly coiled spring. For a long time, it was thought that this spring's stiffness never changed. But fresh data suggest it is weakening.
In a new theory, dark energy and dark matter are not separate entities, but two sides of a single field, born in the Big Bang. At first, the field behaved like a taut spring — the universe expanded with a jerk. Then, as it cooled, the spring relaxed and now pushes more gently. Amazingly, this model has no fudge factors at all. Everything (the push strength, the timing of the shift) is derived from fundamental laws.
Analysis of observations from DESI, Planck, and supernovae already favors this scenario. This means that dark energy is not an eternal mystery, but a bridge between the microworld and the cosmos.
Einstein called the cosmological constant his 'greatest blunder'. Now it turns out that perhaps the blunder was thinking it was constant — dark energy behaves like a weakening spring.