[
Nature,
1994]
On page 32 of this issue, a joint team from the Genome Sequencing Center (St. Louis, USA) and the newly founded Sanger Centre (Hinxton Hall, Cambridge, UK) report a contiguous sequence of over two megabases from chromosome III of the nematode worm, Caenorhabditis elegans. This is the longest contiguous DNA sequence yet determined, and it prompts rumination on how far we have come in the sequencing enterprise, and on how far - and where - we have