What does NYC's mayor control? Here's a look at which powers the office does, and does not, hold.

Zohran Mamdani made many promises on the campaign trail. What powers will he have as chief executive of one of the biggest and most complicated cities in the world?
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What's The Most Efficient 4-Stroke Diesel Engine Ever Built & What Does It Power?

Finnish manufacturer Wärtsilä introduced an engine back in 2015 that was so good, it snagged a Guinness World Records title for being the most efficient four-stroke diesel engine shortly after its ...