Find out when Horizon is on TV today, tonight and this week at the UK TV Listings Guide.
Horizon is scheduled to air at these times (may include spoilers):
How discoveries from the edge of the solar system transformed what was known about Pluto, thanks to the New Horizons space probe that took the first-ever close-up images of the dwarf planet. Pluto was once thought to be geologically dead, but the pictures revealed it to be an active world of stunning complexity, with mountains carved from ice, a nitrogen glacier that appeared to be moving and a recently active volcano. The data even led some scientists to speculate there may even be life on Pluto today
More details for Horizon, Mon 13, 10:30 pm