Padlock Holes
The holes on the bottom or sides of padlocks is used as an orifice to insert lubricant in case the lock gets too rusty to use. They also allow for dirt and water to seep through the lock, again helping to avoid rust.
Believe It Or Not, These Aren't Actually Design Flaws
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The More You Know
- Researchers have found that swearing when in pain may release pain-killing endorphins.
- Did you know that Americans overpay 2.5 billion dollars a year? Believe it or not, the source for a lot of it comes from stores wrongfully overcharging for purchases.
- J is the only letter that doesn’t appear on the periodic table.
- Parts of the Great Wall of China were made with sticky rice.
Post originally appeared on Upbeat News.