from:http://www.scientificamerican.com/blog/post.cfm?id=embryonic-stem-cells-cause-cancer-i-2009-02-19 In May 2001, Israeli parents of a nine-year old boy with a crippling disease that left him wheelchair-bound took their child to see doctors in Moscow. In a highly experimental procedure that was ...
数学定理越接近实际时,越不可靠;而越可靠的定理,越不切实际。 As far as the laws of mathematics refer to reality, they are not certain; and as far as they are certain, they do not refer to reality. Albert Einstein (1879 - 1955) 科学是一件有趣的事,如果你不必依赖它养家糊口的话。(我还要 ...