WORLD-RENOWNED medical researcher Dr Horace Dobbs is coming to Dorchester Arts centre tomorrow night to give a film show and talk on dolphins. During the evening, which starts at 7pm, he will be explaining how the marine mammals 'have a powerful efect on the human psyche' and explaining how they have been invaluable in stimulating children with a wide range of medical problems and boosting the literacy of those with learning difficulties. Arts centre spokeswoman Jennie Runeckles said: "People love dolphins and Dr Dobbs is well-known in his field, so I hope people will come along and have a very enjoyable and interesting evening." Tickets for The Magic of Dolphins cost £5 plus concessions and are available from the Arts Centre in School Lane, The Grove, Dorchester or call (01305) 266926.