Dogs act like toddlers when you need help - but cats just watch. Scientists compared 3 groups: pet dogs, cats, and human toddlers in an experiment where a human parent hides and pretends to look for an object. 75% of dogs and children helped. Cats only helped if it was in their personal interest.

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unsigned long long old_data_bytes = h->length * sizes[h->type];

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To bring a robot to life, motion-activating components, or actuators, are essential. Generally speaking, actuators can either go in and out, or spin around in a circle, and there are many different ways of doing this.

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No base class to extend, no abstract methods to implement, no controller to coordinate with — just an object with the right shape.