You have chosen 'Problems of Philosophy' by Bertrand Russell, 'Sets and Numbers' by Penelope Maddy and 'On the Nature of the Gods ('De natura deorum')' by M. Tullius Cicero
start again | choose another area for these texts | all the ideas for this combination of texts| All the ideas for Natural Reality, or select a subheading: |
| A. | Classical Physics | |
| B. | Modern Physics | |
| C. | Space | |
| D. | Time | |
| E. | Cosmology | |
| F. | Chemistry | |
| G. | Biology |