DESI completes its 3D map of Universe right on schedule Latest data must still be analyzed but could help determine if dark energy is constant or varies over time. https://arstechnica.com/science/2026/04/desi-completes-its-3d-map-of-universe-right-on-schedule/?utm_brand=arstechnica&utm_social-type=owned&utm_source=mastodon&utm_medium=social