稀鬆骨質

稀 = 希 + 禾 : John Hope the Educator (希) teaches Marie Curie (xi) about a very rare (稀) species of bacteria in front of the space station (Ø1). It only grows in watery (稀) cereals (禾) which are stored in the vacuum, like in outer space.

松 = 公 + 木 : Mnemonic symbol: 松鼠, a squirrel.

The squirrel (松) almost got a heart attack when it drove its bus (公) off of one of the stones in front of the engine ((e)ng1), but as it realizes it got stuck in the Susan Saint Bernard's (su) web which spans a Christmas tree (木) and one of the engine's boulders the squirrel (松) relaxes (放松).

骨 = 冎 + 月 : Gitta Giraffe (gu) is performing some dark rites in the space station (Ø3). She 3D printed a whole skeleton (骨) including skull (冎) and is trying to make it come alive under a full moon (月), citing from the Necronomicon.

质 = ⺁ + 十 + 贝 : James II of England (zh) captured a crab (贝) and keeps it as a hostage (质) In the space station's bathroom (Ø4). James II of England wants to find out more about the nature (质) of the banana tree (⺁), so all the crab gets to eat is the banana trees. Secretly the crab set up a small cross (十) to which it prays everyday for its release.