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I've always been intrigued by the idea of training animals to sense medical conditions (via olfactory, sight, etc.). Something to consider, at least.
I'd say transportation. That or medical science.
That's cool :) My book is a modern, MG fiction about a boy who learns that, because of his noble heritage, he's destined to renew the broken...
I value my life too much to do that. You're gonna have to trust me ;)
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