This article was originally published on mentalfloss.com as Can You Solve This Old-Timey Riddle? #3.

An optical illusion which supposedly shows two dogs on a snowy walk alongside a person has stumped a host of Reddit users.

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Below you'll find the 25 best free Steam games Valve's gaming client has to offer, and none of them will go near your wallet. Bear in mind that this list differs slightly from our collection of ...

Anyone who'd rather rent games than purchase them; after all, some new, next-gen titles cost $70. No other service provides what GameFly does, so if you want physical rentals this is your only option ...