In 'Extreme Science' CNN special correspondent Philippe Cousteau journeys to the Arctic to join scientists studying global warming in one of the coldest places on Earth. The hour-long documentary premieres on CNN International Saturday, July 16 at 1600ET.

Join Cousteau for a live chat on Facebook this Saturday at 1600ET to discuss his expedition to the Arctic and the mission of the voyage: http://on.fb.me/mWsG5Y.

Starting Monday, July 18 CNN International kicks off 'Going Green: Green Pioneers', a week-long series of in-depth reports on how people are tackling tough environmental challenges in increasingly innovative ways. Go to www.cnn.com/goinggreen for more details.

Airtimes for 'Extreme Science'

Saturday, July 30: 0900, 1600, 2000 (eastern time) - 1400, 2100 (UK time)
Sunday, July 31: 0500 (eastern time) - 0100, 1000 (UK time)

Airtimes for 'Going Green: Green Pioneers' special

Saturday, July 23: 0900, 1600 (eastern time) - 1400, 2100 (UK time)
Sunday, July 24: 0500 (eastern time) - 1000 (UK time)
Tuesday, July 26: 0630, 1330 (eastern time) - 1130, 1830 (UK time)

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