warp
Explanation
The comic shows aliens arriving on Earth to congratulate humanity on the development of "the warp drive," saying they have been waiting for humans to reach a certain technological milestone. However, the humans sheepishly admit they did not actually develop warp drives -- they cannot even get people past the moon. The aliens are confused and dismayed.
In the next panel, the explanation emerges: "Noah, let's put stuff in the corner so the baby doesn't -- they woke up in a completely different galaxy." The joke is that a baby or toddler accidentally activated or created a warp drive by randomly messing with things, as babies do. The aliens are horrified and ask the humans not to come to their planet, realizing that humanity stumbled into interstellar travel through sheer accident rather than scientific achievement.
The humor operates on multiple levels: the subversion of the "first contact" sci-fi trope where aliens welcome a species that has proven its intellectual maturity, the relatable chaos of toddlers getting into things they should not, and the uncomfortable implication that humanity's greatest achievements might be accidental. The final panel, with the aliens pleading "please don't -- you're already here," suggests humans have already spread before the aliens could stop them, playing on the trope of humans as the chaotic, uncontrollable species of the galaxy.