The waxy cuticle surface on the outside protects the leaf and prevents excess water loss. The palisade cells at the upper side are packed with chloroplasts to maximise photosynthesis. On the lower ...

A kind of built-in GPS informs each cell about its relative position in the growing leaf. The order corresponds to a ...

They discovered that stick- and leaf-imitating insects had all evolved the same 20 basic body features, including body shape, head shape and lobster-like features. In all cases, they noted ...