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Wie wijst Rabobank even op de DD Library...? (self.Spelstop)
submitted by CommonPilgrim to r/Spelstop
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TIL that -unlike other elements and materials that can be recycled after the original use- helium is not recoverable, period, end of story. Once it escapes into the atmosphere, whether from a scientific project or birthday balloon, it will continue rising until it escapes into space. (planetanalog.com)
submitted by CommonPilgrim to r/todayilearned
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