科学普及

科 = 斗 + 禾 : In front of the elevator, Karl Marx wants to conduct one of his science experiments. He wants to condition the matador to only eat cereals until the end of his life.

学 = 小 + 冖 + 子 : Xu Xian wants to study scienceology and learn more about daisies. Just inside the elevator's kitchen, he put some daisies into a prize cup and covered them with a cooking top. He wants to study the growth rate of the daisies depending on the pH of the water in the prize cup.

普 = 並 + 日 : Mnemonic symbol: 斯普特尼克, Sputnik the satellite.

Petra Penguin is really angry at the sun for heating up earth's poles. In the space station she tries to kill the sun with a combine harvester, but the sun defends itself by flinging Sputnik replicas at Petra.

及 = ㇏ + 乃 : Mnemonic symbol: Chinese General 宇文化及 (yu3 wen2 hua4 ji2) from the seventh century.

及 = ㇏ + 乃 : Just inside the space station's entrance a poltergeist is harassing Joan of Arc and Yuwen Huaji by pointing with his fingers at them.