This article was originally featured in Knowable. It was an engineering problem that had bugged Zhibin Yu for years — but now he had the perfect chance to fix it. Stuck at home during the first UK ...

A hydraulic ram is a clever device invented over 200 years ago that can pump water uphill with no other external source of power except for the water flowing into it and there is a way to take ...

The highly efficient devices are the darlings of the environmental movement. Here’s why. By Hilary Howard Heat pumps, which both warm and cool buildings and are powered by electricity, have been ...

In the hierarchy of heating, heat pumps are the new kid on the block—a highly energy-efficient newcomer that both warms the air and serves as an air conditioner within a home. Furnaces, on the other ...

Gas pumps have been around long before "smart" technology. So how are they able to detect when your tank is full?

With global warming becoming an urgent issue, heating our homes efficiently -- and sustainably -- has taken center stage. As winters become more unpredictable (and unexpectedly harsh), finding ...

Heat pumps could help address climate change and save you money. Here’s how they work. MIT Technology Review Explains: Let our writers untangle the complex, messy world of technology to help you ...