This solar array expands itself at the right temperature

Wouldn’t it be nice to have a solar panel that’s only there when the sun shines on it? That’s the idea behind this research project, which uses shape-shifting materials to make a solar panel grow from a compressed state to an expanded one with nothing more than a change in temperature.
The flower-like prototype device is made of what’s called a “shape-memory polymer,” a material that can be shaped when cool to one form, then when heated will attempt to return