The Cool Down on MSN

Germany's tandem solar cell clears the 1-square-centimeter hurdle, sets efficiency record

"Our in-house testing of similar architectures has already reached efficiencies of 27.5%." ...

Voices: Readers share their best heatwave coping hacks

‘We should adopt French working hours’: Readers share their hacks for coping with the heatwave - YOUR VIEWS: From bedroom ...