科学美国人送给我一个电子版的免费账户。

We at Scientific American would like to offer you a complimentary digital subscription to our magazine. We hope Scientific American Digital will be able to provide you with information and research for your blog. It would be great if you could reference the magazine or Scientific American Digital in future entries. The subscription includes 12 monthly digital issues and access to an archive of issues from 1993 to present. You can visit www.sciamdigital.com for complete details.

没有阅读他们杂志的习惯，现在可能会为了利用这个账号，时不时去看看。

这种blog营销方式，科学美国人不是第一个例子。不过这很值得推广啊，这样我们就有机会收到各种免费订阅，书，新产品之类。：D 这比往我们邮箱里扔垃圾邮件强多了。

Mobile Tactical High Energy Laser 视频。另外，Damn Interesting 上有篇很不错的介绍激光，特别是高能激光及激光武器的文章。