To take the word natural first, as likely an act as most to ensure our survival would be to eat a leaf from a tree, bush or herbaceous plant, given that the plant cannot run away as can a prey animal. It might, though, put up physical defences such as thorns or chemical defences, given the prodigious capacity of plants to synthesise metabolites that will harm us and other aggressors.

Read the full article in the upcoming issue to be published on October 1st.