Solar System-817.4.IA-8: Alien Solar System Overrun by an Invasive Species

This solar system (far from Earth) was inhabited by an advanced non-human civilization. They possessed technology that permitted them to traverse the planets orbiting their star at speed, although they had yet to establish a major presence on any extra-solar world. Their fleets of ships propelled their civilization to the cusp of greatness. A critical …

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Earth-805.2.KA-2: Knights vs. Aliens

In the time before the Arrival, small kingdoms laid siege to each other in violent wars, pitting rams and catapults against castles and the lines of horseback soldiers that defended them. Their acts of factional destruction kept them divided, focused on piety and allegiance rather than what they could accomplish together. Earth forever changed when …

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Solar System-177.2.LF-2: A System of Planets Scorched by Capricious Sun Beings

Although there are two habitable planets in this solar system, the only life that is sentient is actually found on the star they orbit.  Its surface is alive with regular flares of magnetic and coronal activity, where strange supernatural life has emerged on its own in the plasma plains of the surface. As commonly happens …

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Local Group-757.4.SC-10: A Universe Home to Alien Superheroes and Cosmic Beings

This was a modern world of superheroes and supervillains.  For those people their superpowers came from alien physiology or "cosmic" forces (incomprehensibly advanced science and technology) from outer space.  The multiverse scholars who studied this world note that it was occupied by large numbers of alien civilizations and filled with starships, and system-scale post-singularity A.I.  …

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World-817.3.DL-66: A Planet Under Attack from Aliens Who Wield Laser Dragons

Unlike the dragons of other worlds, the dragons of this one are eyeless (relying on echolocation and smell), lack front legs, and have finned tails.  They are roughly the size of battle tanks or battleships, and they fly with slow manta-ray like speeds (though they can accelerate for quick dashes if need be).  Despite being …

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Galaxy-608.3.DP-7: A Constellation of Star Systems Under the Rule of Dragons

The dominant species of this galaxy are dragons.  Though lacking any natural ability to breathe fire, they are intelligent and have front claws that function like hands, allowing for dexterous tool use.  This ingenuity, combined with their strength and size (four meters tall and with a five meter wingspan), made them the dominant technological power …

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Universe-958.4.SW-3: A Space Opera Universe of FTLS Magic

Space is incomprehensibly big.  But shortcuts through space exist.  This is not the science fiction invention of faster-than-light travel, but done through the ritual casting of a hyperspace travel magic spell.  The aliens that practice this space-time magic manipulate paths through space to create routes and roads for quick access to other planets.  Curiously, no …

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Exoplanet-007.4.XN-6: An Alien Stone-Age Wilderness

The natives of this planet have four arms.  They live a primitive life, comparable to a stone age that has not yet mastered forging bronze.  At least one tribe has developed both domesticated mounts and the fashioning of copper weapons, and is fast becoming a major regional power. Much of the world is still untamed …

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Astrobiology, and Realistic Alien Design

Life on another planet may be very different from life familiar to us on Earth, but no matter where it lives, it must have the adaptations needed to survive in the environment it lives in. Consider the scientist in the picture here, looking into a hole in the ice at the arctic north. There is life underwater, in the cold and the dark, hanging upside down attached to frozen ice, which is quite alien and unfamiliar to most of us, and yet native to the Earth.