Henry Knox

The powers of Congress are totally inadequate to preserve the balance between the respective States, and oblige them to do those things which are essential for their own welfare or for the general good.

The leg system of the beach animals works because of a combination of certain lengths of tubes. Because of the proportion of lengths, the animals walk smoothly. You could say that this range of numbers is their genetic code.

Vaccines and antibiotics have made many infectious diseases a thing of the past; we've come to expect that public health and modern science can conquer all microbes. But nature is a formidable adversary.