There are three types of solar energy technology widely available today. Photovoltaic cells, first developed at Bell Labs in 1954, contain semiconducting materials that absorb light energy from ...

Not all reactions give off heat like this. In fact, some actually take in or absorb energy from their surroundings, and the reacting substances feel cold. They’re called endothermic reactions.

Researchers engineer a graphene aerogel with nanoscale corrugated walls that achieves both high stiffness and 90% elasticity, ...