Most of the time we’re pretty unimpressed by hashtags, but Twitter’s latest is pretty great.
The hashtag #GreetTheAliensIn5Words is currently trending on the social network, and it’s easy to see why.
Around 50,000 people have posted witticisms under the tag, describing what they'd say to aliens arriving on Earth for the first time.
Here are some of the best entries we’ve seen today (beware slow loading):
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How would you greet the aliens? Let us know in the comments.