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Hi! I’m coming up on Now I Know’s 15 year anniversary, and I’m still learning about what makes the [...]

In the fall of 1964, Esther Castellani got some bad news: her husband of nearly two decades, Rene, was [...]

Green Lake is a lake (no surprise there) about from Milwaukee, Wisconsin. (Here’s a map.) It’s the [...]

On April 20, 2010, the Deepwater Horizon, an offshore oil rig operating in the Gulf of Mexico exploded. [...]

Hi! I want to do more with the Now I Know community. I’ve done a few Reddit “Ask Me Anything” [...]

High school track meets in the United States often feature hundreds of kids competing in a dozen events, [...]

If you’re a child of the 1970s or early-to-mid 1980s or so, there are a few things you probably fear that [...]

The first iPhone was released in the United States in June of 2007. Cell phones were already popular by then [...]

Hi! Earlier this week, Hank Green shared a YouTube video about the dire wolf that was not-quite-rescued from [...]

Lincoln Cathedral, pictured above, is located in Lincoln, England. (Here’s a map.) Construction started [...]