Glow sticks and retroreflectors can help your kids be seen on Halloween night. Here's how they work.
from Science Latest https://www.wired.com/story/how-trick-or-treaters-can-stay-visible-on-a-dark-and-spooooky-night
from Science Latest https://www.wired.com/story/how-trick-or-treaters-can-stay-visible-on-a-dark-and-spooooky-night
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