National Geographic - Our World
Issue link: https://www.e-digitaleditions.com/i/432803
Scientists have found a way to rapidly assess the health of the world's coral reefs without getting wet. Flying as low as 3,000 feet (1,000 metres), the scientists use a device called a spectrographic imager to measure the corals' colour characteristics. Every coral has a distinct spectral "signature" and any changes in this may indicate a change in the health of the reef. FACT Phoenix Islands, Kiribati, Polynesia | Fairy basslet fish dart among blooms of lettuce coral. Photographer: Paul Nicklen. Primary 23 Our World NEW LEVEL 24 Happy Trails 26 World Wonders 28 Spin 29 The Heinle Picture Dictionary for Children 30 Delta Young Learners English: Super Starters, Mighty Movers and Fantastic Flyers 31 Practise and Pass – Starters, Movers, Flyers 31 Our World Readers 32 Primary Classic Readers 33 Delta Adventures in English 33 Theatrical Readers 33 The CLIL Resource Pack 34 Class Act – Short plays with activities for young Learners 34 Telling Tales in English 34 Fun and Games in English 34 Teaching Children How to Learn NEW 35 Teaching Young Learners English 35 Our World Professional Development Programme 35