english: Space doesn't naturally have what we need to survive when we travel there: no air, it's too hot or too cold, no ozone to protect us from those nasty UV rays, either.
non_english: Svemir prirodno nema ono što nam treba da preživimo dok putujemo njime: nema vazduha, previše je vreo ili previše hladan, nema ni ozona da nas zaštiti  od groznih UV zraka.