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35 days after conception, the tiny, blind, hairless embryo emerges and moves into its mother's pouch, purely by instinct. At this stage it weighs about half a gram. Once in the mother's pouch, it...
Immediately after birth, the young koala joey crawls to the mother's pouch, using a combination of instinct and lured by the smell of its mother's milk. Once in the pouch, it latches onto a teat...