GEOGRAPHY IN THE NEWS:
NASA is investigating a growing area over the South Atlantic where the earth's magnetic field is mysteriously weakening, already posing a problem for satellites that fly over the region. "On average, the planet's magnetic field has lost almost 10% of its strength over the last two centuries - but there is a large localised region of weakness stretching from Africa to South America. Known as the South Atlantic Anomaly, the field strength in this area has rapidly shrunk over the past 50 years just as the area itself has grown and moved westward." news.sky.com/story/nasa-investigates-mysterious-south-atlantic-anomaly-12051548
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