Director’s Blog I don’t know why or how April 25th, the day after Earth Day and the day before Save the Frogs Day (really), was named National DNA Day, but once again we have a reason to celebrate the basic language of biology. In fact, this has been a good year for DNA—that 3 billion base-pair long sequence of nucleotides which constitute the building blocks for the 23 pairs of chromosomes found in almost every human cell.

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