These crawls are part of an effort to archive pages as they are created and archive the pages that they refer to. That way, as the pages that are referenced are changed or taken from the web, a link to the version that was live when the page was written will be preserved.
Then the Internet Archive hopes that references to these archived pages will be put in place of a link that would be otherwise be broken, or a companion link to allow people to see what was originally intended by a page's authors.
This is a collection of web page captures from links added to, or changed on, Wikipedia pages. The idea is to bring a reliability to Wikipedia outlinks so that if the pages referenced by Wikipedia articles are changed, or go away, a reader can permanently find what was originally referred to.
A 1 million-year-old fire lit by human ancestors has flickered back to life in a South Africa cave.
Microscopic plant ashes and burned bone bits in Wonderwerk Cave come from soil that previously yielded several dozen stone tools, say archaeologist Francesco Berna of Boston University and his colleagues. A member of the Homo genus, perhaps Homo erectus, made a fire that produced those remains, the researchers write April 2 in the Proceedings of the National Academy of Sciences.
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