A young boy, Andrew "Ender" Wiggin, is recruited to an orbital military academy to train as the next generation of soldiers against humanity's enemy, a species of buglike aliens that Earth repelled a generation ago. Meanwhile, his genius-but-unstable older brother and sister launch disinformation campaigns on the internet after school.

Gravity is fairly important to human comfort and functioning.

For film and television, may be due to budgets; even with a Hollywood budget, zero-g can be prohibitively expensive.