I'm a bit worried, because having consistent stories like this means that not every comic can be super funny. I mean, I hope that the ridiculousness of a scientific paper proving nihilism is a source of humour but it is certainly a different kind of funny than a stupid pun (which I also dearly love, as you will probably know).

Panel 1:
G and H are at their usual table. H has the paper they found least comic.
H: Alright. This paper proves without any doubt that life is completely meaningless. I don’t know what to do now.
Panel 2:
G: So, where do you think those missing scientists went to?
H: standing up un the chair I ... don’t care anymore. It’s meaningless, do you get that? The search for the meaning of life is over. There isn’t one.
Panel 3:
G: You ... you’re scaring me. Maybe we could go eat some ice cream? That usually lightens the mood.
H: now standing on the table, looking very angry LIGHTEN THE MOOD???
Panel 4:
H: You’re suggesting to forget all about it? Live a selfish, hedonistic life? Use the gift of sentience only to amplify biological signals of “happiness” that evolved from random chance in a world that is no longer ours? Completely give in to consumerism, egoism and feel-good-altruism?
Panel 5:
G: cowering, crying I don’t understand most of what you are saying. You were always smarter than me. I’m terrified right now. Are we fighting? Did I do something wrong? If yes, I’ll buy you ice cream. I heard the ice cream place down the street has a new flavour. It has strawberries and little pieces of spiders in it. I could really go for some right now.
Panel 6:
H: still on the table but not as angry anymore No, I’m sorry. We’re not fighting. Let’s go have ice cream. I’m buying.