Large Burmese python on video getting pulled from Florida neighborhood tree: 'It was pretty dangerous' ...

Man Watched Moose For Years—Then Gets Doorbell Cam Alert Of A Lifetime Multiple gunmen open fire at a South African pub, killing 9 and wounding 10 'Avatar' star Sigourney Weaver admits she ignored her ...

几十年来，计算机游戏和虚拟世界一直面临着一个根本性问题：如何创造出既真实又无穷无尽的地形世界。传统的解决方案就像是一台永不停歇的面包机，只能按照固定的配方重复制作相似的面包——虽然能够无限生产，但做出来的东西总是给人一种"假"的感觉，缺乏真实世界那种 ...