Mark Settle, a resident of the UK, bought for his son a wooden model railway.
Analyzing the details of the new toy, he noticed something strange.
Putting two tracks next to each other, he could swear that one of them was much bigger than the other.
But when he swapped them around, the result amazed him.
Note: The video is real. There is no trick involved. It is simply an optical illusion. You can do the experiment easily at home.
This phenomenon is known as the 'Jastrow Illusion.'
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