Stargazing 4

XKCD 4 April, 2025

Decay Chain

XKCD 2 April, 2025

Orogeny

XKCD 31 March, 2025

Terror Bird

XKCD 28 March, 2025

Rock Identification

XKCD 26 March, 2025

SawStart

XKCD 24 March, 2025

Cosmic Distance Calibration

XKCD 21 March, 2025

Square Units

XKCD 19 March, 2025

Lungfish

XKCD 17 March, 2025