A three-alarm fire in Stoneham that blazed in March 2021 was caused by a rare combination of sunlight, curved glass, and combustible materials, the Stoneham Fire Department said Monday.

It's a 1,500 square-foot facade of curved glass, fragmented into small triangular cells. ... As the sun moves overhead, the floor glows with a softer mosaic of sunlight.

Let's turn the sun into a telescope. In fact, we don't have to do any work—we just have to be in the right spot. ... Lenses, like pieces of curved glass, bend the path of light.

Neighbors of the Wilshire Grand tower have a billion-dollar view — but some complain that they can’t enjoy it when sunlight bounces off the nearly completed building’s glass surface.