Tangled Bank No. 77 is up at Aetiology, with its usual selection of blog-posts on biology in general. That includes Andy Jarvis’ piece on climate change here, and also news that chimpanzees may have been using tools — stones to crack nuts — for more than 4000 years. That doesn’t quite make them proto-hunter gatherers, but it is somewhat mind-blowing that the scientists were able to identify a bunch of stones as tools.