BIONBIT: Can We Cry Under Water? Why doesn't glue stick to its bottle or tube? Do fish ever get thirsty, And do they sweat?

The body mechanism of crying under water works just as fine above as below the water. So you can cry tears, they would just be mixed with the rest of the water.

You will not be able to feel the tears run down your face but your eyes will be red when you come up so a lot of other people would be able to tell when you come up out of the water. Also, if you have your goggles on, they will fill up with your tears.

Most of us cry for a reason, which is probably caused by something emotional happening. This means we breathe heavily when we cry, and as you can’t breathe underwater, you would end up drowning from swallowing too much water. So you would most likely end up dead, unless you have an air tank and a mask.

Do fish ever get thirsty, And do they sweat? 

Fishes has their own system to use water which are their gills and skin. So they do not need to drink extra water as humans. They got their needed dose of water by their foods.

Sweating is a process designed to help organisms cool down. On land, sweat on the skin evaporates and takes heat away from the body, making you feel cooler. In the sea, water can't evaporate off the fish because they are already in the water! So no, fish don't sweat. 

Why don't birds fall off trees while sleeping? 

While human feet are pretty much the same from one person to the next, birds' feet can be quite specialized. There are webbed feet for swimming and the talons of a bird of prey for example.

Birds in the order Passeriformes have a specialized method for this. They have flexor tendons in their legs, which, when perched, automatically closes their toes, which allows them to grasp branches, wires, etc. With no extra effort. Passerines account for about half all birds so there are many that are not able to perch effectively.

When they say dogs food is new and improved, who tastes it?

As far as preferences in tastes, every dog has his favorite whether it is canned, dry, or whatever. The answer is simple, the dogs test the food. How do they know it tastes better though? They just see if more dogs choose the improved flavor. It simply comes down to what the dogs like best. By the way how could a person tell you if dog food tastes good to a dog? That is the reason why the dogs test it. 

Why doesn't glue stick to its bottle or tube?

Because it hasn't dried yet.

Most glue doesn't stick to the inside of the bottle because it needs air in order to set. If you leave the cap off of the bottle or as the bottle gets closer to empty so that more air is inside the bottle, the glue will get stickier.

Some types of glue require a chemical other than those found in air. These types of glue won't stick to the bottle, even if you leave the cap off.