Use the Cast button in the YouTube player if it appears. Otherwise, open this film on YouTube or in the YouTube app and select your TV. Keep both devices on the same Wi-Fi.
In desktop Chrome, you can also choose Cast from the browser menu and cast this tab. For Apple TV, use AirPlay in Safari if available, or screen mirroring on your Apple device. Live comments appear on TV only when you mirror the page.
S1E3
What Could Humans Build in 2000 Years?
What might humanity build over the next two thousand years? Set in an imagined year 4001, this film journeys through a civilization reaching beyond the Solar System, mapping its surroundings and building on the scale of stars.
Part of Cosmic Geographic, it explores stellar energy, extraordinary infrastructure, and the ambitions of a society that has outgrown its cradle. This is a speculative future told in documentary form, not a forecast of what humanity will achieve by a particular date.