Beyond the visible world

What if everything we see—stars, galaxies, planets—makes up just a tiny fraction of the universe’s mass? In this episode of The Observatory, we explore the invisible 85% of matter known as dark matter. We’ll examine how physicists like Yahya Tayalati use high-energy collisions and quantum theories to search for elusive particles such as axions and axion-like particles, in an effort to uncover the true nature of this mysterious substance.