For hundreds of thousands of years, humans have been innovators, and every so often these inventions help revolutionize our modern way of life. There are some inventions out there that are so strange you won’t believe they exist. “How could someone even think of that?” you ask yourself. But when you find out it’s available, you wonder how you ever lived without it. Some of these amazing inventions are actually pretty useful, while others are real head-scratchers.

Here are the most amazing inventions that’ll have you wondering why you didn’t think of it first.

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This article was originally published on March 26, 2016.