Carol E. ClelandCarol E. Cleland is Professor of Philosophy at the University of Colorado (Boulder). She is a central figure in the emerging science of astrobiology and has published in major science as well as philosophy journals. Her research focuses on issues in cientific methodology, historical science (especially earth and planetary science), biology (especially microbiology, origins of life, the nature of life, and astrobiology), and the theory of computation. Read More Read Less