The idea that forest trees can ‘talk’ to each other, share resources with their seedlings — and even protect them — through a connective underground web of delicate fungal filaments tickles the imagination. The concept is so intriguing, it’s taken root in popular media — even being raised in the popular Apple TV show Ted Lasso — and been dubbed the ‘wood-wide web,’ but the science behind those ideas is unproven, cautions an expert.