Stuart Clark: It’s so clearly obvious that the world isn’t flat. We see when ships leave the harbour you can see as they gradually disappear below the horizon. You can see if you go up on top ...

A s vast and flat as its title, "Horizon: An American Saga" can carry many descriptions. Call it hokey or homespun, old-school or out-of-touch, all would apply. But don't you dare say wistful ...

He advised people to seek out a flat horizon, and keep their fingers crossed for a clear sky. Mr Szwajkun also urged stargazers to get their binoculars ready - and have a star map handy.