According to this saga of intellectual-property misanthropy, these creatures [patent trolls] roam the business world, buying up patents and then using them to demand extravagant payouts from companies they accuse of infringing them. Often, their victims pay up rather than face the costs of a legal battle.

A judge found parts of last year’s “riot boosting” laws to be unconstitutional, in part because they were aimed at demonstrations against the Keystone XL pipeline.

When pouring a new driveway, you can use a two-by-four as a float.

Stokes' theorem relates the integral over a surface of the curl of a vector field to a line integral around the boundary of that surface: ∫S∇⨯ mathbf F·d mathbf S=∫(∂S) mathbf F·d mathbf r,.