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"Operation Space Station: High-Risk Build" debuts Nov. 5, 2025 at 9 p.m. ET on PBS. "Operation Space Station: Science and Survival" drops Nov. 12, 2025, at 9 p.m. ET. Both will stream at PBS.org/NOVA, ...

You might store your precious memories in diary passages or in photos backed up on a hard drive. But thanks to physics, no memory can last forever—not in a diary, not in a hard drive, not even in your ...