Add Yahoo as a preferred source to see more of our stories on Google. Green plants and shelf in front of glass block windows - Ina Smirnova/Getty Images Glass block windows were trendy in the 1980s, ...

The new dynamic windows would be able to switch between a normal transparent mode that lets in light and heat, a mode that blocks heat but remains transparent to light, and a tinted mode that blocks ...

If you’ve been in Pittsburgh for more than a few hours, you’ve definitely seen them. They’re in basement, bathroom and kitchen windows, of course — odds are you have one in your house. But they also ...