For questions about humans as we know them or slightly changed, their physiology, psychology, politics, society and goals.
Primarily used for members of the species homo sapiens and any other beings of the homo genus. These beings may still have enhanced abilities, either chemical, biological (e.g. DNA manipulation) or mechanical (e.g. cyborgs). Creatures that deviate from human biology should instead be considered animals (fauna) or aliens. The question should specifically be concerned with humans, namely some currently extant trait or some change from the real world (e.g. survival on a 2g world), rather than mention humans tangentially.