Scientists believe dark matter could leave faint color traces on light, challenging the idea that it’s completely invisible. Their model suggests future telescopes could detect these signatures, revolutionizing the search for the Universe’s missing mass. Credit: AI/ScienceDaily.com Dark matter, the mysterious substance thought to make up most of the Universe, might not be completely invisible after all. A new study suggests it could leave behind a faint red or blue "fingerprint" in light that