The conceptual artwork has an estimated value of between $1 million and $1.5 million at Sotheby's auction on Nov. 20.

Walk into any supermarket and you can usually buy a banana for less than $1. But a banana duct-taped to a wall? That might ...

Laying tiles evenly can be a lot of work, and the process is fraught with room for error. Here's the tool that can make ...