„We establish the flexibility of 3D printing by two-photon polymerisation to produce particles smaller than 10 microns with a high-degree of shape complexity. […] (a) A spiky sphere, (b) a starship, (c) a spiral, (d) a helix, (e) a trimer and (f) 3D benchy boat.“ (Doherty et al. 2020).
„[W]e show that as pumpkins grow, they morph from spherical to pancake shapes, flattening up to 50% in height-to-width aspect ratio.“ (Hu et al. 2011)