Sink your teeth into Jean Painlevé's nature films at an exhibition in London.

In theory, semiconductor nanocrystals are highly suitable laser materials, not least because the colour of their light is tunable over a wide range. In practice, they are difficult — but not impossible — to deal with.

What forces shape the membranes of the biological cell? A computer simulation indicates that it is the concerted effort of many proteins, mediated by the lipid bilayer that forms the membrane matrix.