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Bathymetry is the study of the underwater depth of sea and ocean floors, lake floors, and river floors. It has been carried out for more than 3,000 years, with the first recorded evidence of measurements of water depth occurring in ancient Egypt. Bathymetric measurements are conducted with various methods, including depth sounding, sonar and lidar techniques, buoys, and satellite altimetry. However, despite modern computer-based research, the depth of the seabed of Earth remains less well measured in many locations than the topography of Mars. Bathymetry has various uses, including the production of bathymetric charts to guide vessels and identify underwater hazards, the study of marine life near the bottom of bodies of water, coastline analysis, and ocean dynamics, including predicting currents and tides. This video, created by the Scientific Visualization Studio at NASA's Goddard Space Flight Center, simulates the effect on a satellite world map of a gradual decrease in worldwide sea levels. As the sea level drops, more seabed is exposed in shades of brown, producing a bathymetric map of the world. Continental shelves appear mostly by a depth of 140 meters (460 ft), mid-ocean ridges by 3,000 meters (9,800 ft), and oceanic trenches at depths beyond 6,000 meters (20,000 ft). The video ends at a depth of 10,190 meters (33,430 ft) below sea level – the approximate depth of the Challenger Deep, the deepest known point of the seabed.Video credit: NASA / Goddard Space Flight Center / Horace Mitchell, and James O'Donoghue

Welcome

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Hello, Sillydragon! Welcome to Wikipedia.

Now that you've joined up, you might want to introduce yourself to the community at the new user log.


You can help improve the articles listed below! This list updates frequently, so check back here for more tasks to try. (See Wikipedia:Maintenance or the Task Center for further information.)

Fix spelling and grammar
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Help counter systemic bias by creating new articles on important women.

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You might find these links helpful in creating new pages or helping with the above tasks: How to edit a page, How to write a great article, Naming conventions, Manual of Style. You should read our policies at some point too.

If you have any questions, see the help pages, add a question to the village pump or ask me on my talk page.. I hope you enjoy editing here and being a Wikipedian!

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Again, welcome! - BCorr|Брайен 05:07, May 13, 2004 (UTC)


Voting History (since I started keeping track)

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  • No -- on replacing the image of a clitoris with an anatomical drawing. This isn't the Dark Ages.
  • Yes -- on enforcement of the Three Revert Rule


Talk Stuffs

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Hello there! :) I was just wandering around Wikipedia and sumbled into your talk page. Since you're keeping track of what you vote, I got interested on where are these votes. :) --Ekevu (talk) 17:45, 7 Dec 2004 (UTC)


Lurking

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Thanks. can you comment on the talk page then, both on the research and the vote? Thanks FT2 21:56, Dec 9, 2004 (UTC)


Urgent: Vote re Ciz

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The arbcom post is being processed shortly. can you indicate on my talk page User:FT2 whether you would support a full wikipedia ban for Ciz? Thanks FT2 21:08, Dec 16, 2004 (UTC)

iff vs. if

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Hi there, I just wanted to let you know while it's a very good thing you're watching out for spelling mistakes, "iff" is actually the correct word in articles like unfoldable cardinal - it's a word used mainly by mathematicians that means "if and only if". ^^ -- Schneelocke (cheeks clone) [[]] 15:09, 26 Dec 2004 (UTC)

Yidlix

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...is Yidlix no more, apparently. Many thanks for helping block this in-DUH-vidual. - Lucky 6.9 02:19, 16 Feb 2005 (UTC)

  • Glad to be of service. }:) --Sillydragon 02:37, 16 Feb 2005 (UTC)

Thanks.

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Thanks for rv my userpage. :) – Quadell (talk) (sleuth) 13:09, Feb 16, 2005 (UTC)

you are a silly dragon, yes you are, yes you are!

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Hey! If you're interested, I started a series of userboxes for the game NationStates. Feel free to add any or add your own!-🐦Do☭torWho42 () 05:08, 16 December 2017 (UTC)[reply]