These two lethal viral diseases, one rapidly fatal and one progressing slowly over a period of years, occur in animal populations in the same area of central Africa and have presumably entered the human population multiple times during the mllennia since humans appeared on earth. This article argues that the presence of a highly virulent disease like Ebola prevents establishment of HIV in populations by removing immunocompromised individuals before they can infect others.
The genetic diversity of the planet is like a vast library full of rare and unique texts. Wanton environmental destruction causing mass extinction is like burning a library, and much genetic engineering is like clumsy editing of classics of literature for commercial purposes.
Failing to respond appropriately and respectfully to differences of opinions about controversial scientific issues is bad pedagogy, and presuming that no legitimate controversy can exist, simply because the preponderance of evidence now at our disposal favors a particular theory, is bad science. How many theories, espoused within the last hundred years with as much fervor as those mentioned in the Tennessee statute, are now wholly or in part discredited?