xkcd #3295: Semaphore

xkcd #3294: Asteroid Mission

xkcd #3293: Handedness

xkcd #3292: Geology Class

xkcd #3291: Launchpad

xkcd #3290: Trade

xkcd #3289: Highway Signs

xkcd #3288: Archery Feat

xkcd #3287: Perseids

xkcd #3286: Particle Physics Equipment

xkcd #3285: Accretionary Arc

xkcd #3284: Geology Building

xkcd #3283: Size and Lifespan

xkcd #3282: Trick Play

xkcd #3281: Antiques Roadshow

xkcd #3280: Maze

xkcd #3279: Main Span

xkcd #3278: Vera Rubin Observatory

xkcd #3277: Forth

xkcd #3276: Recursive Trucker's Hitch