A daredevil climber known as the 'French Spiderman' has scaled the world's tallest twisted skyscraper without a safety harness.Alain Robert climbed Dubai's 1,007ft Cayan Tower with nothing more than sticky tape and chalk, which he kept in a pouch clipped to his waist, for help, the BBC reported.Hundreds of spectators looked on as the 52-year-old scaled the 75-storey tower that has a twist of 90 degrees in less than 70 minutes. 

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Robert has scaled the Eiffel Tower in Paris and Sydney Opera House. In 2011, he scaled the world's tallest tower, the Burj Khalifa in Dubai, which stands 828-metres (2,717-feet) tall.