Horizon Season 39 Episode 11
Episode Title: The Day We Learned to Think
Genre:
Documentary
Countries:
UK,
Airing Date: February 20, 2003
Runtime:50 mins
IMDb Rating:
Watch Horizon Season 39 Episode 11 full movie online free in HD with English subtitles – no download needed.
Horizon: Explaining the deadly phenomenon of 'lake overturn', which occurs when levels of carbon dioxide in volcanic lakes become unbalanced and rise to the surface, releasing the gas into the surrounding air.