Why Is 95% Of The Universe Invisible?

How did our universe emerge from a single mathematical point of infinite density? In this episode of SpaceTime, astronaut and scientist Ulrich Walter joins top cosmologists to retrace 13.8 billion years of cosmic history. We investigate the "Dark Ages" of the universe, the violent birth of the first stars, and the mysterious "Dark Matter" that holds galaxies together despite defying the laws of Newtonian physics.

Courtesy of Spark on YouTube. Watch on YouTube ↗

More Space & Cosmos Documentaries

Life Beyond II: The Museum of Alien Life (4K)2020•38m•4K•★9.2Life Beyond: Visions of Alien Life (4K)2024•1h 48m•4K•★9.1Death of the Universe (4K)2019•29m•4K•★9Shouting at Stars: A History of Interstellar Messages2022•32m•HD•★8.8How Will We (Most Likely) Discover Alien Life?2023•19m•HD•★7.7Why Magnetic Monopoles SHOULD Exist2021•18m•4K•★7.7A Journey to the Center of the Milky Way - Space Documentary 20262026•36m•4K•★8.3Our Planet: High Seas2020•49m•HD•★8.0Kingdom of Saturn: The Spacecraft Cassini's Epic Quest2024•52m•HD•★8.0NASA's Billion Dollar Mission to Visit Every Planet in Our Solar System2025•3h 27m•HD•★8.0The Insane Science of Neutron Stars [4K]2024•40m•4K•★7.9The Quest to Find Life on Mars2026•44m•HD•★7.7