Mercury is the planet closest to the Sun. Its daytime temperatures reach 430 degrees Celsius, hot enough to melt lead. Yet, at its poles, hundreds of billions of tons of ice are hidden in craters that haven't seen sunlight for billions of years.
Where does that ice come from?

New research from 2026 suggests it may have originated from a single comet that briefly enveloped Mercury in a cloud of water vapor. And that's not the only secret; planets we thought were dead may still release substances from within. Their rocks are unlike those on Earth, and deep within their core, there may be kilometers of diamonds.

Tonight, we'll stand on Mercury before the Bepi Colombo spacecraft enters orbit this November, and we'll learn that the warmth on our planet is anything but ordinary.

🔭 Deep Space — A space documentary that doesn't just "get to know" the universe, but "look at it anew."

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