Log-in to bookmark & organize content - it's free! Steven Johnson describes the sights, sounds and most importantly, smells of London in 1854 In 1854, the London neighborhood of Golden Square ...

The earthly globe is spherical; more precisely, it is an oblate spheroid, like a ball slightly flattened at the poles. More precisely still, it is a triaxial ellipsoid that closely approximates a ...

Most of us never need to use numerical GPS coordinates to take advantage of the many location-based services that are available to us. We simply input an address, or click through ...