What is it that makes us human? There are more than seven billion of us on the planet, superficially different but fundamentally we are the same. Imagining how earthlings might look to an alien visiting our planet for the first time, portraitist Sasha Gusov has visited 40 countries to create this tongue-in-cheek investigation of the human race. In humorously captioned photos, here are ballerinas and sumo wrestlers, exhibitionist athletes and stylish Muslim ladies, melancholy waifs and exuberant students, all unusual at a glance yet somehow familiar.