The election of a US president almost always seems like a crossroads, but the choice to be made on 4 November feels unusual, and daunting, in its national and global significance. . . .
[T]he core values of science are those of open debate within a free society that have come down to us from the Enlightenment in many forms, not the least of which is the constitution of the United States.
On a range of topics, science included, Obama has surrounded himself with a wider and more able cadre of advisers than McCain.