This adorable video shows a thrill-seeker gran taking on the world's fastest zipwire - aged 91. Retired headteacher Margaret Carroll has swum with stingrays and abseiled 100ft down a mountain cliff. She has flown in a helicopter over the Grand Canyon and climbed the Great Wall of China, as well as flying in a hot air balloon. Margaret. from Portishead, North Somerset, also took part in the Holms Race in a sailing boat around the Bristol Channel, and climbed Mount Snowdon, as well as swimming in the Dead Sea. She says age is just a number and has no plans to slow down.
