A Week In Science – 9 November 2012

Great Barrier Reef suffered a collapse in coral coverage between 1920 and 1955 Article from NBC News

Intestinal worms may help fight autoimmune diseases Article from ABC

Regular exercise increases life span Article from Herald Sun

Drought may have led to Mayan downfall Article from Nature

Pacemaker developed which uses heartbeat as power source Article from MIT Technology Review

Alzheimer’s may be predicted long before symptoms appear Article from BBC

Earliest stone tools found in Africa Article from The Australian

Fairy Wrens use specific tunes as passwords between mother and young Article from Herald Sun