According to a Northumbria University academic, humans are attracted to plant based substances such as tea, tobacco and drugs because our brains are similar to those of insects.
Professor David Kennedy has written a book showing how human brains are just a more complex version of those of insects.
More top news
Emma Jesson brings you Sunday's forecast
The singer confirmed she had welcomed her first child in an announcement on the eve of Mother's Day.
Emma Jesson brings you Saturday night's forecast