DNA Day, which commemorates the completion of the Human Genome Project and the discovery of DNA's double helix, is being celebrated by the National Human Genome Research Institute this year on April 23.  This event encourages teachers and students to celebrate these historic achievements. Related online resources include:

• The National Human Genome Research Institute provides teaching tools, a chatroom, and webcasts for DNA Day.

• The Nature Publishing Group has compiled the original articles, historical perspectives, and examinations of DNA in medicine, society, and as a biological molecule in Double Helix: 50 years of DNA.
• BBC News offers many resources describing the story behind the discovery of DNA.
• RCSB PDB Molecule of the Month features on DNA, Designed DNA Crystal,  Transfer RNA, and Self-splicing RNA.
• The Nucleic Acid Database is a repository of three-dimensional structural information about nucleic acids. The NDB has a searchable database and a browsable Atlas that provides summary information and images for each structure in the database.