xkcd #3156: Planetary Rings

xkcd #3155: Physics Paths

xkcd #3154: Physics Insight

xkcd #3153: Hot Water Balloon

xkcd #3152: Skateboard

xkcd #3151: Window Screen

xkcd #3150: Ping

xkcd #3149: Measure Twice, Cut Once

xkcd #3148: 100% All Achievements

xkcd #3147: Hiking

xkcd #3146: Fantastic Four

xkcd #3145: Piercing

xkcd #3144: Phase Changes

xkcd #3143: Question Mark

xkcd #3142: -Style Pizza

xkcd #3141: Mantle Model

xkcd #3140: Biology Department

xkcd #3139: Chess Variant

xkcd #3138: Dimensional Lumber Tape Measure

xkcd #3137: Cursed Number