Under Hal Kvisle, who started as chief executive in September, Talisman is taking a more conservative financial approach and will focus on three core areas - the Americas, South East Asia and the North Sea.

BBC: Talisman reports drop in North Sea production

Predator Project found that wolves rarely survive outside of the three core recovery areas: Yellowstone National Park, central Idaho and Northwest Montana.

CNN: Northern Rockies wolf report released

These would be initially in three core subject areas - English, maths and sciences - with an extension later to history, geography and languages.

BBC: Ofqual may step in over speedy GCSE shake-up

The original plan had been for the first candidates to start courses in 2015 and take the new-look exams two years later, initially in three core subject areas - English, maths and sciences - with an extension later to history, geography and languages.

BBC: Education & Family

For the Mango remake, Microsoft focused on three main areas that it considers core to the smartphone experience: communications, applications and the Internet.

FORBES: Microsoft Makes Windows Phone More Social, Intuitive With 'Mango' Update