This year's Valentine's Day Google doodle features 2 adorable aliens. Here's the past 10 years of Google doodles celebrating love.

· Google doodles started back in 1998. Since then, Google has featured more than 4,000 doodles marking holidays, events, and history.
· Google's first Valentine's day doodle appeared in 2000. This year's doodle features two cute extraterrestrials.
· Here's a look into the past ten years of Google Valentine's Day doodles.
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