谢天谢地

谢 = 射 + 讠 : Marie Curie (xi) just came back from her trip to outer space and is standing in front of the launch pad (射) in the elevator's bathroom (e4). She thanks (谢) her sponsors and points towards the sponsors' advertising column (讠), saying that it would have been impossible to go to outer space without their funding.

天 = 一 + 大 : Mnemonic symbol: an angel from heaven. Mother Teresa (ti) programmed a robot (大) to play a flute duet together with her in front of the anthill (an1). As they play their flutes (一) an angel (mnemonic symbol for 天) hears their heavenly tune and descends from heaven (天) to listen to them.

地 = 也 + 土 : Dorothy Gale (di) hates the cleanliness of the space station, so she used an excavator (也) in the space station's bathroom (Ø4) to dig a pile of dirt (土) out of the ground (地) for a mud bath.