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Wow! I Never Knew That! (Episode 15)

10 minutes 15 seconds

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Host Jeff "JJ" Johnson highlights the Boston University Bridge. He also explores why the U.S. uses 120 volts instead of 240, whether swimmers really need to wait an hour before swimming after a meal, how birds sleep standing up, how the gun worm became a corkscrew, how D-Day and Bluetooth got their names, how dry cleaning works, and the invention of bifocals. Part of the "Wow! I Never Knew That!" series.

Media Details

Runtime: 10 minutes 15 seconds

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Still image from: Wow! I Never Knew That! (Episode 1)
Wow! I Never Knew That!
Episode 1
10 minutes 53 seconds
Grade Level: 7 - 12
Still image from: Wow! I Never Knew That! (Episode 2)
Wow! I Never Knew That!
Episode 2
10 minutes 7 seconds
Grade Level: 7 - 12
Still image from: Wow! I Never Knew That! (Episode 4)
Wow! I Never Knew That!
Episode 4
10 minutes 52 seconds
Grade Level: 7 - 12
Still image from: Wow! I Never Knew That! (Episode 6)
Wow! I Never Knew That!
Episode 6
10 minutes 54 seconds
Grade Level: 7 - 12
Still image from: Wow! I Never Knew That! (Episode 7)
Wow! I Never Knew That!
Episode 7
10 minutes 21 seconds
Grade Level: 7 - 12
Still image from: Wow! I Never Knew That! (Episode 8)
Wow! I Never Knew That!
Episode 8
10 minutes 6 seconds
Grade Level: 7 - 12
Still image from: Wow! I Never Knew That! (Episode 10)
Wow! I Never Knew That!
Episode 10
9 minutes 46 seconds
Grade Level: 7 - 12
Still image from: Wow! I Never Knew That! (Episode 15)
Wow! I Never Knew That!
Episode 15
10 minutes 15 seconds
Grade Level: 7 - 12
Still image from: Wow! I Never Knew That! (Episode 17)
Wow! I Never Knew That!
Episode 17
10 minutes 14 seconds
Grade Level: 7 - 12
Still image from: Wow! I Never Knew That! (Episode 18)
Wow! I Never Knew That!
Episode 18
10 minutes 18 seconds
Grade Level: 7 - 12