Previously on TV

How the Universe Works

Secret History Of Mercury

Previously shown on Discovery .Science on Wed 23 Sep 2026 at 03:00.

This showing has ended

This showing was on Discovery .Science at 03:00 on Wed 23 Sep 2026. See future airings below or open the main programme page for the latest TV times.

Current How the Universe Works TV times View Discovery .Science listings

Airing details

ChannelDiscovery .Science

StartsWed 23 Sep 2026, 03:00

EndsWed 23 Sep 2026, 04:00

Episode / edition: Secret History Of Mercury

SkySky Q / Satellite167

About this showing of How the Universe Works

For four years, the Messenger space probe sent images of Mercury, the solar system's smallest planet, closest to the Sun. Could it threaten life on Earth.

Next showing of How the Universe Works

The next currently listed showing is Thu 24 Sep 2026, 13:00 on Discovery .History.

See all current showings

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