Why are human eyes different colours?
by from on (#6DKFX)
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
Why are human eyes different colours? Gabrielle Kuper, aged 5, London
Post your answers (and new questions) below or send them to nq@theguardian.com. A selection will be published next Sunday.
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