Could Hockney prints make a mint? As artist's death sparks revival, here's what investors must know

As one of the greatest modern artists David Hockney attracts huge attention among collectors - and his death last month at the age of 88 only increased his appeal.

Online learning site makes changes after reporter finishes two classes in hours

Sophia Learning has started blocking students from downloading the course materials and using Ctrl-F to find answers during ...