源
=
原
+
氵
:
The origin (源) of the H bomb can be traced back to when Yu the Great (yu) once forgot a lot of water bottles (氵) next to her A bomb (原) in the anthill's kitchen (an2) and accidentally detonated the bomb.
spring (small stream) / mouth of a spring / coin (archaic)
泉
=
水
+
白
:
Cupid (qu) opened a hot spring (泉) in the anthill's kitchen (an2) by connecting a water fountain (水) with the anthill's heating system. To mark his hot spring as a place of peace he set up a white flag (白) at the side of the spring.