We start this page with the hypothesis that the lexicon is initially underspecified: that some features may be NIL (not specified as either plus or minus). A NIL feature is represented either with no ...

They may not have verbs, nouns or past participles, but birds challenge the notion that humans alone have evolved grammatical rules. Bengal finches have their own versions of such rules – known as ...

The love song of a humpback whale sounds magnificently free-flowing and improvised to the casual human listener. But fresh mathematical analysis of shows there are complex grammatical rules. Using ...