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4
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1answer
88 views

What is the significance to life of the anomalous properties of water? [closed]

I have heard that the anomalous properties of water - e.g the fact its solid form is less dense than its liquid form - is extremely important. In fact, some people have gone so far as to tell me it ...
3
votes
2answers
118 views

Do dolphins really sleep?

I have always wondered, if dolphins sleep with one eye opened, do they really sleep at all? According to this article dolphins indeed shut down their brains. I already googled it. No help from ...
3
votes
1answer
44 views

What would be the impact of depositing limestone in the oceans (to reverse acidification) on ocean life forms and biodiversity?

This question asked: What is the evidence it is feasible to reverse ocean acidification by adding large quantities of a base (bicarb soda)? The result was: Danny Harvey of the University of ...
2
votes
1answer
46 views

Effect of extremely hard water on marine life?

When researching water quality standards, I found that a minimum and maximum was set for water hardness. Several sources also state that water can in fact be too hard. The question is how does hard ...
2
votes
1answer
172 views

In scuba diving, are nitrogen narcosis and high pressure nervous syndrome the same thing?

In training for scuba diving, they tell you that when you're bellow 100 ft or so you have to watch out for changes in mental state that resemble drunkenness. The cause of these mental disturbances is ...
1
vote
1answer
52 views

What are these curious cetaceans?

At the beginning of the superb documentary film “Un jardin d’Eden sous les mers” (“A garden of Eden under the seas”) [1], we see a group of curious cetaceans. At about 1 min. What are these ...
1
vote
1answer
37 views

Why can one swim longer underwater by blowing out air?

I am a human. I take a deep breath. I swim underwater... After some time, I need to blow out some air. I blow out some air... By doing so, I can swim underwater longer. Blowing out some air gives me ...
1
vote
1answer
445 views

Is it true that oxygen has a diffusion rate in air 10,000 times greater than in water? [closed]

According to the Wikipedia page on the design of gills, oxygen has a diffusion rate in air 10,000 times greater than in water. Is that true? The WP entry refers to: M.B.V. Roberts, Michael Reiss, ...
0
votes
1answer
24 views

Why is flash light harmful to what aquatic life forms?

When visiting an aquarium, it's often not allowed to take photographs with a flashlight on. It is said that the flash light with very high intensity is harmful to the displayed life forms. I respect ...