Dark matter constitutes approximately 27% of the universe, significantly outweighing visible or baryonic matter, which accounts for only 5%. While baryonic matter consists of the protons and neutrons that form stars, planets, and living organisms, dark matter remains invisible because it does not absorb, reflect, or emit electromagnetic radiation. Its existence was first theorized in 1933 by astronomer Fritz Zwicky, who observed that galaxies within the Coma Cluster moved at speeds that should have caused them to fly apart based on visible mass alone. This led to the conclusion that an unseen gravitational "glue" provides the necessary mass to hold these cosmic structures together. Modern astronomy maps dark matter through gravitational lensing, a phenomenon where massive invisible clusters warp the fabric of space-time and bend light from distant galaxies. This substance acts as a cosmic skeleton, forming massive halos that provide the structural foundation for galaxy formation and prevent stars from escaping their orbital paths. Scientific efforts to identify these elusive particles include deep underground experiments like the LUX-ZEPLIN, which utilizes large tanks of liquid xenon to detect rare interactions between dark matter and normal atoms. Despite its ghostly nature—with billions of particles passing through the Earth and human bodies every second—dark matter remains a fundamental pillar of cosmological stability. ⁠Listen Ad-Free on Patreon. ⁠ For just $3 per month, you can get ad-free versions of Fun Facts Daily, Who ARTed and Art Smart. Head over to ⁠https://www.patreon.com/cw/FunFactsDailyPod⁠ if you are interested. Want to learn more? Head over to my website www.funfactsdailypod.com and be sure to listen to my other podcasts Who ARTed: Weekly Art History for All Ages or Art Smart. For family fun, check out my son's podcast Rainbow Puppy Science Lab Fun Facts Daily is an Airwave Media Podcast. If you are interested in advertising on this or any other Airwave Media show, email: [email protected] Learn more about your ad choices. Visit megaphone.fm/adchoices