A controversial ancient map has sparked debate among historians and theorists alike. Could this be evidence of lost ...

Ricci map - detail from a China panel. All images via Wikipedia. In 1602, the Wanli Emperor of the Ming dynasty had a big ...

Could it be that our Paleolithic forebears were more than artists and hunters, that they were also the world’s earliest hydraulic engineers? The finding at the Ségognole 3 rock shelter in France’s ...

In this tutorial article, we provide a historical picture and review the basic concepts in this field. In particular, we introduce the general theory of linear time-varying (LTV) systems and discuss ...