阅读理解 a i recently spent two years in the arctic filming the series blue planet. i love being in an environment that hasn't changed for 20,000 years. of course it's freezing, but it must be a healthy place because you never catch colds. when i'm filming, i like to really feel how lonely the environment is. filming underwater involves cutting through thick ice and diving in tied to a line. the person at the other end has to be ready to pull you out fast if necessary. originally i was a research diver for the british antarctic survey project, but for me science lacked excitement. i'd always enjoye
