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3
votes
1answer
51 views

Does urine therapy really work?

I heard a lecture from a supporter of urine therapy and he says that urine is not only good disinfection, but also drinkable source of minerals. I said to myself that I can take either one or the ...
5
votes
1answer
749 views

Why do organisms excrete nitrogenous wastes?

All plants and animals excrete nitrogenous wastes in the form of urea, uric acid or ammonia. But isn't that a bit of a waste? I mean, there is a shortage of biologically available oxygen in the ...
7
votes
2answers
6k views

Why do dogs try to cover their poop?

It may seem obvious to us humans to hide our excreta, but this is not quite normal behavior for animals. Interestingly, dogs have the habit to pee all over the place. It's know that they do so to ...