NASA is getting ready to communicate with aliens (Update 2), Sploid

"We can say little, if anything, about what these patterns [above] signify, why they were cut into rocks, or who created them. For all intents and purposes, they might have been made by aliens." When a new NASA book on alien communications has a paragraph like that, you better pay attention. Update 2: NASA pulled the book and press release from their site. Now the book is available here, as pointed out by a commenter."

Keith's note: Someone found a book "Archaeology, Anthropology, and Interstellar Communication" online at NASA.gov - one that NASA paid for, published, and posted. At one point it off handedly talks about aliens leaving messages on rock. So NASA pulls it offline. Now, people reading the articles that refer to the book get a dead link [update: NASA put the book back online so the link works again]. Well, nothing ever really disappears on the Internet. You can download the book here. Duh.

Keith's update: Classic NASA explanation below. NASA should post it on NASA.gov - at the links that news articles have been linking to so that all the people coming to visit the broken link see the real reason. When NASA just pulls things offline with no explanation it simply fuels these sort of stories. Without the original document online no one can see the context that NASA wants you to refer to. So they go with what NASA has left there - a big gapping hole.