tectonic

NATURE
Living Volcanoes

NATURE: Living Volcanoes

 

Volcanoes are the portal to the earth’s fiery magma heart; one might imagine that life above ground would avoid living nearby. But a surprising number of animals survive and thrive alongside them. Right now, in any 24-hour period, some 30 volcanoes are erupting on our planet. This film will uncover the varied activity – both human and natural – that occurs on the slopes of active volcanoes. All life on Earth owes itself to their existence. Volcanos create the land we live on, emit gas that forms the air we breathe, spew minerals from the center of the Earth and make homes for spectacular natural history – they are the source of life.

 

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NOVA
Killer Volcanoes

NOVA: Killer Volcanoes

 

Join NOVA and a team of volcanologists looking for an elusive volcanic mega-eruption that plunged the medieval earth into a deep freeze. Investigate the geologic evidence from Greenland all the way to Antarctica to identify the 750-year-old culprit.

 

NOVA
Sinkholes: Buried Alive

 

In Tampa, Florida, in February 2013, a giant hole opened up under the bedroom floor of Jeffrey Bush, swallowing the 36-year-old as he slept. His body was never found. Bush was a victim of a sinkhole – a growing worldwide hazard that lurks wherever limestone and other water-soluble rocks underpin the soil. When carbon dioxide in the air dissolves in rainwater, it forms a weak acid that attacks the soft rocks, riddling them with holes. Sinkholes can occur gradually when the surface subsides into bowl-shaped depressions or suddenly, when the ground gives way – often catastrophically.