Operant learning is a process by which a specific behavioural response (such as a lever press) is associated with a biologically salient stimulus known as a reinforcer (such as food). The dorsomedial ...

Most cooling technology in use relies on vapor-compression technology, which circulates chemical refrigerants through a compressor. “The cooling sector has historically been very risk-averse,” said ...

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...

The cost of installing a central air conditioning system varies widely depending on your home’s size, the type and efficiency of the unit, and whether ductwork is already in place. Some or all of the ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Thom Dunn Thom Dunn is a writer focusing on home heating and cooling. He once ...

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? Tired of using loud and unsightly window air conditioners? Even if you don’t have the ...

For many runners, the marathon represents the ultimate test of physical and mental endurance. The months leading up to a marathon require careful planning, including a sensible and progressive ...

With so many supplements on the market, it’s tough to figure out what actually works—let alone which products are even safe to begin with. Creatine is one of the few (alongside protein powder) that ...

The experts at CR have curated everything you need to know to create a comfortable home: the best heating and cooling solutions, smart maintenance ideas, and savvy shopping tips.

Host Terrance McKnight presents a one-hour special highlighting the life and music of composer and conductor Coleridge-Taylor Perkinson. Feb 24, 2026 Host Terrance McKnight presents a one-hour program ...