xkcd #3133: Dual Roomba

xkcd #3132: Coastline Similarity

xkcd #3131: Cesium

xkcd #3130: Predicament

xkcd #3129: Archaeology Research

xkcd #3128: Thread Meeting

xkcd #3127: Where Babies Come From

xkcd #3126: Disclaimer

xkcd #3125: Snake-in-the-Box Problem

xkcd #3124: Grounded

xkcd #3123: Canon

xkcd #3122: Bad Map Projection: Interrupted Spheres

xkcd #3121: Kite Incident

xkcd #3120: Geologic Periods

xkcd #3119: Flettner Rotor

xkcd #3118: iNaturalist Animals and Plants

xkcd #3117: Replication Crisis

xkcd #3116: Echo Chamber

xkcd #3115: Unsolved Physics Problems

xkcd #3114: Building a Fire