Red spiders
Red spiders
[Many six-legged red spiders standing on and hanging from cuboids. The cuboids hang in the air with no visible means of support. Some of the spiders have made a bridge out of themselves.]

The early comics often feature a style different to what would become the signature xkcd stick-figure style. This comic is the first in an arc of comics, spaced out over 3 years (so far), in which Red Spiders are seen attacking humans. Its objective is not to be funny, philosophical, or scientifically interesting; it just tells a story, in a Questionable Content -esque way.
Interestingly, the red spiders actually more closely resemble opiliones, the order of arachnids that includes the Daddy Longlegs, and which are actually more closely related to mites than to spiders. Of course, the number of legs is incorrect.
The full series of Red Spiders comics:
[Many six-legged red spiders standing on and hanging from cuboids. The cuboids hang in the air with no visible means of support. Some of the spiders have made a bridge out of themselves.]
