- Ocean Science: The power of plankton by Paul Falkowski
- Climate Change: A planet in flux
- Synthetic Biology: Bits and pieces come to life
- Cancer: Solving an age-old problem
- Stem Cells: Flexible friends
Lenses in Biology collection from Nature Outlook: free (for now at least) & worth a look
Some nice long features in Nature Outlook on various topics plus interviews with the authors. Summed up in Lenses on Biology. All freely available though I think that is only for this collection and not in general for Nature Outlook.