Phase Change

XKCD 16 December

METAR

XKCD 13 December

The Maritime Approximation

XKCD 11 December

Making Tea

XKCD 9 December

Seismologists

XKCD 6 December

Infinite Armada Chess

XKCD 4 December

Advent Calendar Advent Calendar

XKCD 2 December

Second Stage

XKCD 29 November

Neutrino Modem

XKCD 27 November