Xkcd acceptable dating ages
Xkcd acceptable dating ages - speed dating hci method
Exosemanticists have their work cut out understanding them, and exopsychologists in figuring out what they're all about.Relations between humans and Really Aliens are necessarily limited, since we have so little in common with them.
This is for an obvious reason: the audience wants aliens of One of the first ways in which we learn to classify objects is into two groups: 1. Nevertheless, the task of defining "life" is both difficult and subtle; something that at once becomes evident if we stop to think. The caterpillar is alive, but the rock is not; as you guess at once, since the caterpillar is moving and the rock is not.
Or what if a drop of water were trickling down the trunk of the tree?
The water in motion would be alive, but the motionless tree trunk would be.
Convergent evolution might well produce a generally humanoid body plan, just as sharks and dolphins have a similar overall configuration.
But Aliens with Forehead Ridges have much more than a general similarity to Earth Humans.
This is partly because it is not clear what we would fight them over, and partly because they may have an alarmingly high TECHLEVEL, making war with them a dangerously one-sided proposition. See COSMIC BACKGROUND HISTORY.2) Aliens with Forehead Ridges.
Much more common - especially in HOLLYWOOD SCIFI - than Really Aliens, these are species that look almost exactly like Earth Humans, except for some distinguishing visible feature such as, well, forehead ridges, or odd-shaped ears, or whatever.It would be expecting much of anyone to guess that an oyster were alive if he came across one (for the first time) with a closed shell.Could a glance at a clump of trees in midwinter, when all are standing leafless, easily distinguish those which are alive and will bear leaves in the spring from those which are dead and will not?Only rarely will anybody get to know one on a personal level.TRADE with them is sporadic, and even WARFARE seems less frequent than it used to be in the GOLDEN AGE.Except for the Energy Beings, most seem to be hydrocarbon life forms, but methane breathers who thrive at -200 C will sometimes turn up.