Looking for the filly Twi comic where she thinks Celestia is as old as dinosaurs.

Basically the title. It’s somewhere between 2-5 Twilight asks some question about dinosaurs. I believe Celestia doesn’t know, and Twilight has this suspicious face and says something about wouldn’t she know being as old as she is. And I think it ends with Celestia with an unamused expression.

This one?

@Terton
Yes! That’s it. Thank you.

And now I feel silly, because when I went to the image it was in my favorites already, and I didn’t think to just check that.

Hah. Wow, that’s cute.