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Stream the full Horizon Season 38 Episode 13 movie online for free in crystal-clear HD quality. No downloads required—just press play and enjoy the action, complete with English subtitles for an enhanced viewing experience.

Horizon: In 1967, scientists discovered that explosions of extraordinary violence were ripping through space on a daily basis, each with enough destructive power to obliterate the entire solar system. This documentary examines further investigations which have revealed the source of these phenomena to be 'hyper-novas', the collapsing of stars 20 times larger than the sun. These could well hold the answer to how the earliest stars were formed at the dawn of time.