Nary a religious word is spoken as the many uses of water are elucidated.

What, no baptism?

Yeah, but since they’re christian, god will take care of that no matter what, so why worry?

@ ^ Trebuchet : The Christians in Holland and Florida to name a couple of other low lying places maybe?

Sorry typo – Zubeneschamali : http://stars.astro.illinois.edu/sow/zubenes.html

Kepler186 f : http://www.space.com/25530-earthsize-exoplanet-kepler-186f-habitable-discovery.html

Gliese 581 d : https://en.wikipedia.org/wiki/Gliese_581_d

(The existence of Gliese 581 g, an earlier suspected and announced world around that star – located next to Beta Librae a.k.a Zubenescahmali in our skies and only 20 ly distant – which was even more promising for life has since been refuted, sadly.)

Plus : https://en.wikipedia.org/wiki/List_of_potentially_habitable_exoplanets

Kepler 22, Kepler 438 b, Kepler 296 e and more are out there. I would caution that there are a lot of uncertainties for instance the exact masses of some of these exoplanets and whether liquid water is actually present and or how their atmospheres may render such oceans non-surface or too deeply buried or too hot /cold etc .. Note that worlds previously thought to be suitable have shifted into the “sorry, not so-much” column when more information has come in or calculations been made. Still. All that aside, it seems pretty clear other Earths with other seas are almost certainly out there and probably even relatively common.

I mean, seriously, these folks are so invested in Earth being unique that they have to blind and deafen themselves to any evidence to the contrary. I’m sure they’d backpedal and claim they meant liquid water, but that won’t fly, either – Europa has 2-3 times the volume of Earth’s liquid water in its subsurface oceans. (1) At the moment, only Earth is known to have so much liquid water on the surface, (2.) but give us a few decades and I’ll bet you a dollar we’ve found a planet or hundred with far more liquid surface water than we have got. (3.)

Numbers added for ease of reference below :

1. Not just Europa either, a lot of Jovian and Saturnean and other outer solar system moons and even Ceres :

Once thought to be rocky, we now believe Ceres may contain 200 million cubic kilometres of water in its mantle. This is more than the amount of fresh water on the Earth.
– Page 10, “Ceres may be a failed miniplanet” by Jeff Foust in Astronomy Now magazine, November, 2005.

Earth may have aquired a lot of its water from comets and icy asteroids.

2. Pluto from just days ago seems geologically active as do parts of Charon – could be that water there is on surface or near it as a form of exotic “lava” flow! Mars has hints of surface liquid water too :

http://www.smh.com.au/technology/sci-tech/nasas-curiosity-rover-finds-the-first-signs-mars-has-liquid-water-right-now-20150413-1mkdvi.html

Albiet seasonal and very salty!

3. We already have a number of possibilities with exoplanets like Kepler 186 f, Gliese 5812 d (if it exists) and others being likely suitable for having liquid surface water although whether or it is actually present remains unknown if highly likely.