mars, red planet, planet
space shuttle, rocket, lift-off
earth, planet, atmosphere
mountains, man, cross
alien, robot, android
spaceship, ufo, science fiction
mite, aceria anthocoptes, acari
sun, star, planet
ufo, extraterrestrial, spacecraft
knowledge, book, library
pill, capsule, medicine
analysis, biochemistry, biologist
geometry, math, mathematics
spacex, spaceship, satellite
red blood cells, blood vessel, blood flow
valencia, spain, calatrava