The comments on this one are worth a peek.
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RT @newscientist@twitter.com
Moons can have moons and they are called moonmoons http://bit.ly/2CABDF4
https://twitter.com/newscientist/status/1050050002121297922
The comments on this one are worth a peek.
---
RT @newscientist@twitter.com
Moons can have moons and they are called moonmoons http://bit.ly/2CABDF4
https://twitter.com/newscientist/status/1050050002121297922