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　　英国BBC电视台耗时5年制作的纪录片《冰冻地球》于近期推出。这部耗资巨大的纪录片用镜头真实的展现了正在逐渐溶解的地球两极，以及生活在这里的各种生物，片中种种景象让人叹为观止。　　纪录片的解说员大卫

Three-part series by Michael Cockerell going behind the scenes at Whitehall

For centuries we have dreamt of reaching the centre of the Earth. Now scientists are uncovering a bi

Horizon explores the secrets of what makes a long, healthy and happy life. It turns out that a time

Around the world, a new generation of astronomers are hunting for the most mysterious objects in the