(Reuters) -British YouTube travel blogger Benjamin Rich, who specialises in remote and sometimes dangerous parts of the world, has been arrested at the Baikonur Cosmodrome in Kazakhstan, the head of the Russian space agency Roscosmos said on Saturday. Dmitry Rogozin said in an online post that Rich – whose Bald and Bankrupt channel has 3.53 million followers – and Alina Tseliupa had been detained near one of the launch pads at Baikonur, which Russia rents from Kazakhstan. Local authorities were determining “the exact level of participation in illegal activities” by the pair, said Rogozin, who …