Believe It Or Not, These Aren't Actually Design Flaws

The Hole in a Pen Cap

You'd think the hole in a pen cap serves no purpose, but it's actually a safety precaution. For whatever reason, people love to chew their pen caps. If a child happened to swallow one, the hole in the top allows air to circulate to prevent choking.

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The More You Know

  • The first roller coaster was invented to stop sinful behavior.
  • Your heart beats 100,000 times a day.
  • The fastest gust of wind ever recorded on Earth was 253 miles per hour.
  • But the loudest animal relative to its size is a water bug.
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