Does Ball Lightning Exist? | Britannica
Lightning - Museum of Science and Industry
Stronger Storms To Hit Chicago Thursday Evening
Ball lightning - Wikipedia
Strangest Weather On Earth: Balls of Lightning! - YouTube
Physics - First Spectrum of Ball Lightning
What it's like to be struck by lightning - BBC Future
Lightning | Voltage, Causes, & Facts | Britannica
Photos: Lightning over Chicago -- Chicago Tribune
Image of rare triple lightning bolt captured over Chicago's night sky
Image of rare triple lightning bolt captured over Chicago's night sky
Spectacular lightning strikes accompany Chicago-area storms
Lightning zapped four of Chicago's tallest skyscrapers at once Monday. Here's how. - The Washington Post
Chicago Triple Lightning Strikes to Sears, Trump, Hancock - June 30 - YouTube
Triple lightning strikes on Chicago's three tallest buildings, and an overall skyscraper lightning bonanza - June 30, 2014
Scientists capture the first ever footage of ball lightning | Daily Mail Online
Image of rare triple lightning bolt captured over Chicago's night sky
Can you use the phone or take a shower during a thunderstorm? These are the lightning safety tips to know. - CBS News
Image of rare triple lightning bolt captured over Chicago's night sky
Glass spheres forged by volcanic lightning offer clues about eruptions | PBS NewsHour
Ball lightning - Wikipedia
Record-Breaking Lightning Bolts Spark Excitement | Smart News| Smithsonian Magazine
One strike, you're out! Take me (safely!) out to the ball game | Vaisala
Watch: Video shows massive lightning bolt striking Boston - CBS Boston
