"about math, research papers, science"

"老虎是飞行员"

"Space probe on an alien planet"

"Wizard with a book of ancient spells"

"Alien with a cosmic map"

"Cybernetic eagle"

"Haunted opera house"

"Viking with a drinking horn"

"Spaceship flying through an asteroid belt"

"Cybernetic tiger"

"Sorceress with a magical mirror"

"Robot with a plasma gun"

"Dragon breathing ice"