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[blueimpulse]

how do the birds know when to wake up when it's still dark?
i wouldn't be able to wake up without an alarm clock.

Comments

[jadedriot]

circadian system. although its quite amazing the crap they do to confuse birds. there are 5 well developed chapters in my bio book about it. i could lend it to you!

[bryanbiz]

go to sleep