World Solve

Cosmological data show the Universe’s expansion speeding up, yet we lack a clear physical mechanism beyond a simple cosmological constant. Precision surveys and alternative gravity theories could clarify whether dark energy is a new field or modified gravity.

Big Bang models suggest equal amounts of matter and antimatter, yet the observable Universe is dominated by matter. Precision measurements of CP violation and new physics at high energies could explain the imbalance.

Theory predicts metal-free stars that reionized the Universe, but no such stars have been observed. JWST-class telescopes and 21cm cosmology experiments could provide indirect signatures.

Dark energy accounts for roughly 68% of the universe, yet its equation of state and microscopic nature remain complete mysteries. Precise mapping of cosmic expansion over time is crucial for predicting the ultimate fate of space-time.

Measurements of the cosmic microwave background yield a lower expansion rate than direct distance ladder measurements of modern galaxies. Resolving this discrepancy could reveal brand-new physics beyond the Standard Model.

Observations show massive black holes existing just a few hundred million years after the Big Bang, far too fast for standard accretion models. Direct collapse seed theories or primordial black hole physics need verification.

This period, known as cosmic inflation, is widely accepted as a concept but the exact physical mechanism driving it remains unproven. Confirming it would close a major gap in our understanding of the universe's first moments.

We understand the general physics of dying stars, but the precise trigger moment inside a collapsing star remains difficult to observe and model. Solving this would sharpen predictions about stellar life cycles across the universe.

If every event is caused by prior physical states, it's unclear how genuine choice could exist in the way we intuitively believe it does. This tension underlies debates about moral responsibility, punishment, and praise.

Current detectors cost billions of dollars and can only catch the largest cosmic collisions. A cheaper detection method would let us study the universe's most violent events far more often.

We know roughly when life began, but not the exact chemical steps that turned non-living matter into something that could reproduce. Solving this would also tell us where else in the universe life might arise.

Gravity should be pulling everything together over time, yet distant galaxies are accelerating away from each other. This mystery, blamed on dark energy, remains one of the biggest open questions in physics.

Dark matter and dark energy make up roughly ninety five percent of the universe, yet we've never directly detected either. Everything we can see and touch is a small fraction of what's really out there.

Gravity describes the large scale universe well, and quantum mechanics describes the tiny scale well, but the two don't fit together mathematically. A unified theory would finally explain what happens inside black holes and at the birth of the universe.

Every search so far has come back empty, but our tools for detecting distant life are still crude. Knowing the answer would reshape biology, philosophy, and how we think about our place in the universe.