New Research In
Physical Sciences
Social Sciences
Featured Portals
Articles by Topic
Biological Sciences
Featured Portals
Articles by Topic
- Agricultural Sciences
- Anthropology
- Applied Biological Sciences
- Biochemistry
- Biophysics and Computational Biology
- Cell Biology
- Developmental Biology
- Ecology
- Environmental Sciences
- Evolution
- Genetics
- Immunology and Inflammation
- Medical Sciences
- Microbiology
- Neuroscience
- Pharmacology
- Physiology
- Plant Biology
- Population Biology
- Psychological and Cognitive Sciences
- Sustainability Science
- Systems Biology
Climate Change and Food Security Special Feature
- You have accessAdapting agriculture to climate changeS. Mark Howden, Jean-François Soussana, Francesco N. Tubiello, Netra Chhetri, Michael Dunlop and Holger Meinke
- You have accessGlobal food security under climate changeJosef Schmidhuber and Francesco N. Tubiello
- You have accessClimate change and the adequacy of food and timber in the 21st century
- From the Cover
William E. Easterling - You have accessThe impact of climate change on smallholder and subsistence agricultureJohn F. Morton
- You have accessCrop and pasture response to climate changeFrancesco N. Tubiello, Jean-François Soussana and S. Mark Howden
- 100th Anniversary (44)
- Anthropology (224)
- Applied Mathematics (79)
- Astronomy (9)
- Biochemistry (799)
- Cell Biology (471)
- Chemistry (471)
- Colloquia (176)
- Commentaries (457)
- Computer Sciences (52)
- Core Concepts (59)
- Corrections (324)
- Developmental Biology (200)
- Ecology (381)
- Economic Sciences (64)
- Editorials (4)
- Editorials (48)
- Engineering (202)
- Environmental Sciences (256)
- Evolution (450)
- Feature Articles (55)
- Feature Articles (1)
- Front Matter (104)
- Genetics (350)
- In This Issue (117)
- Inaugural Articles (76)
- Inaugural Articles (554)
- Inner Workings (93)
- Introductions (19)
- Letters (1749)
- Letters and Replies (433)
- Mathematics (12)
- Medical Sciences (548)
- Microbiology (536)
- Neuroscience (912)
- News Features (65)
- Nobel Lecture (7)
- Opinions (69)
- Perspectives (73)
- Pharmacology (85)
- Physics (288)
- Physiology (179)
- Plant Biology (314)
- PNAS Classics (13)
- PNAS Profiles (339)
- Political Sciences (17)
- Population Biology (47)
- Profiles (60)
- QnAs (122)
- QnAs (49)
- Retractions (12)
- Retrospectives (26)
- Retrospectives (100)
- Science and Culture (65)
- Significance Statements (278)
- Social Sciences (140)
- Statistics (58)
- Sustainability Science (267)
- Sustainability Science (936)
- Systems Biology (81)
- Special Features
- Sackler Colloquia
- Microbes and Health (25)