Readers reply: the universe is expanding – but what is it expanding into?
by from Science | The Guardian on (#5GR1D)
The long-running series in which readers answer other readers' questions on subjects ranging from trivial flights of fancy to profound scientific and philosophical concepts
Scientists and astronomers tell us that the universe is expanding. But what is it expanding into, ie what's beyond the universe?
Phil Town, Lisbon
Please email new questions to nq@theguardian.com
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