Scientists are predicting a worldwide fall in family sizes before the end of the century, as families get more 'vertical' – meaning more grandparents and great-grandparents, and fewer cousins, nieces, and nephews.
Research reveals why the typical family is shrinking gjsentinel.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from gjsentinel.com Daily Mail and Mail on Sunday newspapers.