Invisible LinesOur world has innumerable boundaries, ranging from the obvious like oceans and mountain ranges to the intangible like subtle differences in language or climate. Most of us cross invisible lines all the time, but rarely do we stop to consider them. 'Invisible Lines' presents 30 such unseen boundaries, intriguing and unexpected examples of the myriad ways in which we collectively engage with and experience the world. From football fans in Buenos Aires

there is sweat and some blood

And then there's the truth

guaranteed to fill your day with snacking joy

from his rabid fans and from an America burning with the fever of the Vietnam War

aided by Violet Natalie Lindstrom

this indispensable knitting guide is guaranteed to inspire your next project and help you complete it with ease

he has had more race wins than Lewis Hamilton and Stirling Moss

the salacious stories behind the portraits

blood sugars and cholesterol down

But on closer inspection

whose secret new hobby is itself an act of rebellion

Varoufakis sparked one of the most spectacular and controversial battles in recent political history when