Stick insects keep evolving to have the same strange body plans over and over again, scientists have discovered. This ...

It had previously been suspected that the liquid helps glue insects to vertical surfaces through capillary and viscous forces, much as a thin layer of water helps a wet beer glass stick to a tabletop.

Its heroes, twigs, are disguised as leaves. Yet, they move! The English-speaking world calls them stick insects, while the French more commonly refer to them as phasmes. The star of our story is ...