Finally a topic I already know something about, in Poland schools they taught us that clams require a very specific enviroment which allows clams to be a tester for water as they are very vurnerable to enviroment changes, unluckily they can only live in healthy bodies of water which gives us the ability to determine in what state the water is.,(reply>), @Hold Ma Cat It's extracurricular knowledge, however some biology textbooks (like Nowa Era for example) do add this info on clams used by Poznan's Aquanet.<br>One more interesting fact on Polish science - we also have the only European institute that studies phage therapy (a therapy that uses viruses to kill dangerous bacteria), and it's located in Wroclaw. : ),(reply>), @WalrusRobot it's not like it works the same in every other language.,(reply>), @Laurence Fraser It's not like the concept of a run-on sentence is unique to English grammar either.,(reply>), @Laurence Fraser thank you for explaining what a run-on sentence is.<br>I don't see the point about complaining about it though.,(reply>), ​<br><br>​ @The Aristocrat  A run-on sentence is one that goes on for much long than it should, as the speaker keeps adding conjunctions and subclauses instead of starting a new sentence. This maks it quite difficult for the listener to keep track of what the speaker is even talking about. In written form this problem can also be caused or made worse by leaving out necessary punctuation.