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When animals become pregnant do they recognize that they have a baby within them, or does their behavior change solely because of instinct and a change in hormone/chemical production?

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When animals become pregnant do they recognize that they have a baby within them, or does their behavior change solely because of instinct and a change in hormone/chemical production?	1
Some day far into the future, could the sun be used as an all-purpose trash disposal, or would there be potential dangers in doing so?	1