Let's make this birthday one to remember.

40 years old (Born on October 17, 1984)

Happy Birthday, Randall Munroe! May your day be filled with fewer existential questions than an average xkcd comic and more joy than successfully explaining rocket science through stick figures. Your brilliant blend of humor, math puzzles, and relatable nerdiness has kept millions laughing—and occasionally scratching their heads—since the early days when 70 million views seemed astronomical.

From NASA roboticist to internet cartoon legend, you've shown us that curiosity is timeless (and often hilarious). Here's hoping this year brings you even greater success—or at least enough material for another decade's worth of comics about physics mishaps and awkward social interactions.