@Princess Trixie vi Equestria  
Its nailed into their keratin.

just one question, wouldn’t they take the hoof horseshoe thingy off to go to bed?

@RainbowDash69  
Oh no, there’s overwhelming evidence that there was. There almost certainly was. Even disregarding all the geological signs of riverbeds and such, just look at this, even on absolutely enormous scales - stuff you can see from orbit:  

 
Southeast and northwest of the Viking 1 landing site are some extremely distinctive signs of water drain beds - in fact, the tear-drop shaped “islands” - the enormous scale of them, I’ve heard is distinctive of some absolutely cataclysmic-sized event. At some point, some sort of enormous natural dam may have burst or something - whatever the case, there was a massive flood through here.
 
Note the canyon to the south - it’s large enough to stretch the some-odd 2,000 miles across the continental U.S, or across all of Europe - it’s not due to water erosion, though, it’s more distinctive of something due to continents drifting apart, back when Mars was tectonically active - it’s not now.
 
Anyways, those deltas I mentioned earlier, take a look and compare to to river deltas on Earth:
 
 

 
Note those features are on a scale of maybe a few miles for the top one, and a some hundred yards, tops, for the bottom one. Meanwhile those deltas on Mars are on the scale of hundreds of miles.
 
Also note the amount of water in the river clearly has a size relation to the size of the river. The tiny rivers in the top one clearly don’t have any delta, never mind one as large as the main delta.
 
Now compare that to those deltas on Mars, and you realize that that really must’ve been an absolutely cataclysmic event…

@Cirrus Light  
that’s why it’s so interesting. there might have been liquid water before it turned to ice! :D

Aw, man, wearing your shoes in bed??
 
…honestly, the idea of ponies wearing horseshoes seems oddly kinda grimdark to me. Not that it’s painful, but you can’t take them off and they’re big metal things nailed on to your body… Even if it’s just senseless nail, still.
 
@RainbowDash69  
@pinkiebutt
 
Actually, a significant fraction of Mars’ soil is water ice.
 

 
I’m not sure how they get this data, but one chart had “surface water ice” replaced with “neutron flux” or something, so I guess it’s some kind of crazy scattering or something. Evidently they can do it from orbit.
 
Liquid water, on the other hoof, that’s a different story…

This is wonderful.

Oh man sleepy Twily is THE BEST.

@Neko Majin C  
Doctor Who Ref..! +1

@pinkiebutt  
The last time hey found water on Mars, it did not end well for anyone on Bowie Base One. The Flood saw to that.

@RainbowDash69  
I think we actually have found water on Mars now, sooo

@Background Pony #8BF2  
as sure as there’s water on Mars ;)

He loves drawing mouths, are we sure he aint Ponythroat?

@Keith Mowz  
It’s hard to explain, really. :P

@redweasel  
Teeth aren’t actually appealing for the majority of people who like mouth-stuff, though. Its all the warm, wet and fleshy bits. (Can’t imagine why that’d be, of course :p)

@RainbowDash69  
except they’re not pony teeth
 
which is fine b/c horse molars are scary
 
but you’d think skimping on the teeth to make them a simple white ridge is odd for an artist who loves mouths so much. even the edge on the lampshade has more detail than the teeth.

CREAM OF THE CROP

May I snuggle with you princess?

Go to sleep, my drowsy princess. You can finish your book tomorrow.

This is making me drowsy.

Looking at this is making me sleepy. I’m just gonna—
 
Zzzzzzzzzzzzzzzzzzzzzzz…….

@RainbowDash69  
I agree to that.

Dat tongue is sexy.  
Dat backbend curve is sexy.  
Dat wing hand is sexy.  
Dat soft underhoof is sexy.
 
unf

@Epicalaxy Master  
i don’t care much about vore but pony mouths/teeth are always nice to see

You want to cuddle with the sleepy pony

@RainbowDash69  
I don’t mind them as much as the horseshoes, and I don’t even like vore.