I don’t need sleep.

1- There may be cracks in the earth that let sunlight leak in from the surface.
2- Perhaps cars have fallen into the Underground, or Papyrus has heard about them from Undyne, who read about them in a manga.
3- Weather is able to occur in large enough underground spaces, so snow is possible in Snowdin.

Huh. Ok. Also how about HOW DO FLOWERS BLOOM?! And how does Sans bleed and sweat? I forgot those two.

1 - With sunlight and precipitation, plants can grow. Both of these are possible based on what I have already said in answers 1 and 3. Plus, some plants are able to grow underground.
2 - Sans is not a human skeleton, Sans is a monster. Monsters are magical. And thus we don't have an actual understanding of Sans' biology.

…
Where the hell did you learn this.

...
The internet.

…
Oh wow.

1: yes
2: yes
3: yes

Ah, yes. "Because yes."

Correct

*has an existential crisis*

M-me too!

AAAAAAAAHHHHH

Really how does papyrus anything he does

magic

CHAIN TIME

don't mind me

1: glow worms or luminescent stones
2: maybe when Alphys created phones they were able to connect to the internet, and Papyrus found pictures of cars
3: maybe its so cold that the water that drips from the stalactites on the ceiling of the cave crystallizes and becomes snow, and over the years it piled up

Oh yeah-

Guys, you know what time it is.

YES CHAIN

don't mind if i do

C O N T I N U E T H E C H A I N

YESSIR

that was heavily gay, l kinda liked that

Bish I'm female

same here bish

i'm confused and scared

Yes

NO U SUPPOSED TO START A CHAIN!!!!!111

S-Sorry!!

the underweb

Rain too.

crystal: don't
errora: how thought!?!
steam: *confused*
lily: ...and how is there TWO INK MACHINES!?
me: *confused cat noises*