A new theoretical study suggests dark matter may not exist, proposing instead that gravity behaves differently across vast cosmic distances. By modifying how gravity weakens over scale, the research explains galaxy rotation and lensing effects without unseen particles, raising questions about long-standing cosmological models and inviting a fresh look at gravity’s h...

NASA’s SPHEREx telescope has observed interstellar comet 3I/ATLAS unexpectedly brightening as it leaves the solar system. The comet released water vapour, carbon dioxide, and organic compounds months after its closest solar approach. Scientists say the findings provide a rare chemical snapshot of material formed around another star, helping compare planetary ingredi...