Prolly a science joke but i dont get it

I think I get not sure

I don’t get it

I don't get them all

does anyone know what this means?

John?

Is there something more implied by the look on her face?

I get the bit that it’s a “pup” tent and Snoopy is a dog, but the shocked look on her face as she’s looking into the tent makes me think she’s seeing something surprising or alarming. Or am I looking for a joke where there isn’t one?

guys i feel dumb

What is knuckles trying to say?

Does the ball on they guys head mean anything?

Please explain