Consider the southeast coast of North America and the nothwest coast of Africa. According to the current theory of plate tectonics, these two regions were once very close together. However, the coasts do not quite fit together like puzzle pieces, as one might
expect. This can be explained by the fact that the southeast edge of North America's
actually does fit nicely with
the northwest edge of Africa's
even if the coasts do not

The human genome project is devoted to mapping the general dna sequence of our species. this could lead to the development of new medicines, as well as the possibility of using gene therapy to treat certain diseases. however, there are some ethical issues surrounding the mapping of individual genomes. one concern is a) that your genes may change over time, making the project useless. b) that insurance companies could discriminate based on genetic make-up. c) that since this has never been done before, we should probably not do it now. d) that sequencing our individual genomes is so expensive, it is a counter-productive strategy.