In geometry, there are surfaces that do without an inside or outside—and some need at least four dimensions to exist ...

AppLovin Inc. executives announced Monday that they are giving up an effort to merge with Unity Software Inc. Wallace Witkowski came to MarketWatch from the Associated Press in New York, where he ...

Perovskites are promising materials for solar cells. A layer of dipolar molecules at the perovskite surface improves the efficiency of these devices. Read the paper: All-perovskite tandem solar cells ...

Robot vacuums have steadily improved their cleaning performance and object avoidance over the years, but during our testing at CNET Labs, we discovered an odd trade-off. Ajay has worked in tech ...

Will Kenton is an expert on the economy and investing laws and regulations. He previously held senior editorial roles at Investopedia and Kapitall Wire and holds a MA in Economics from The New School ...

Marshall Hargrave is a stock analyst and writer with 10+ years of experience covering stocks and markets, as well as analyzing and valuing companies. A merger combines two companies into one.