Get married or stay single? Live in the city or country? Dog or Cat? Science has the answers

We all face so many big decisions in life, but maybe recent scientific research can help us make better choices

Should you get a cat, shun meat, live child-free and cancel your Facebook account; or get a dog, gorge yourself on steak, have a huge family - and post about it every day? We look at what new research tells us about the big choices in life