Rented by the BP oil company to drill an oil well in the Gulf of Mexico, the Deepwater Horizon drilling rig explodes on April 20, 2010, before sinking into the ocean and causing a gigantic oil spill. At issue: negligence in the maintenance and in the tests carried out.
Something weird seems to be happening to our weather - it appears to be getting more extreme. In the past few years we have shivered through two record-breaking cold winters and parts of the country have experienced intense droughts and torrential floods. It is a pattern that appears to be playing out across the globe. Hurricane chasers are recording bigger storms and in Texas, record-breaking rain has been followed by record-breaking drought. Horizon follows the scientists who are trying to understand what's been happening to our weather and investigates if these extremes are a taste of what is to come.
Professor Chris Jackson charts the planet's changing climate. He shows how the oldest rocks and fossils provide evidence of radical climate changes throughout its history, revealing that what drives them is the amount of carbon dioxide in the atmosphere.
Venture into the danger zone of two volcanic craters posing widely divergent threats. Hawaii's Kilauea is a shield volcano that threatens communities with its slow-but-relentless lava flow, while the Sumatran Sinabung is a stratovolcano delivering carnage via a sudden and explosive surge of superheated gas and rock.