Optimal packing problems have inspired mathematicians for centuries. Biophysicists now add a layer to the question: How do chloroplasts arrange themselves optimally within cells, when the meaning of ...

These images show chloroplasts in an Elodea densa plant cell (green), overlayed by their tracked movements over twenty minutes. The colour of the movement track represents the distance covered, as ...

Elodea densa is an aquatic plant. Its leaves obtain their green colour from the many chloroplasts within each plant cell. Image by Nico Schramma (UvA). Elodea densa is an aquatic plant. Its leaves ...