Jan 12 2015
There are many enduring controversies within science, and they are fun to follow. There are raging debates about the so-called Hobbit or Homo floresiensis, is it a new species or a diseased human? You may be surprised to hear that there is still a controversy over whether or not the dinosaur extinction was due to a meteor impact or other terrestrial factors (although I think this one is heavily tilting toward the impact theory).
One controversy I have been following, here and on the SGU, concerns the Young Dryas and whether or not the cooling characteristic of that period was due to melting glaciers or a local comet impact.
Such controversies always raise a few general issues for me. The first is how the mainstream media covers them, which I always find disappointing. Properly covering genuine scientific controversies is challenging, but that is what science journalists are supposed to do. What I find is that they tend to present each new study in the debate as if it is definitive and has ended the debate, rather than putting it into the proper context of the ongoing controversy.
Another common mistake is to rely on one expert rather than getting a reasonable sample. They tend to weight the story toward the side of the expert on which they relied, and maybe provide only token coverage of other views. There is also, of course, the issue of proper balance. Reporting should reflect the balance of opinion in the scientific community. It’s OK to present minority opinions but they should be presented as such.