Search results
Results from the WOW.Com Content Network
Sleep can follow a physiological or behavioral definition. In the physiological sense, sleep is a state characterized by reversible unconsciousness, special brainwave patterns, sporadic eye movement, loss of muscle tone (possibly with some exceptions; see below regarding the sleep of birds and of aquatic mammals), and a compensatory increase following deprivation of the state, this last known ...
Goosebumps are a strange evolutionary phenomenon triggered by cold temperatures and intense emotions. They’re also experienced by animals. Experts explain why.
Goose bumps can also be a response to anger or fear: the erect hairs make the animal appear larger, in order to intimidate enemies. This can be observed in the intimidation displays of chimpanzees, [ 11 ] some New World monkeys like the cotton-top tamarin , [ 12 ] in stressed mice [ 13 ] and rats, and in frightened cats.
Goosebumps have a practical purpose for animals. When an animals’ hair sticks up it makes it look bigger and helps protect it against predators. A raised layer of fur can also help keep an ...
The distinction is not absolute, because crepuscular animals may also be active on a bright moonlit night or on a dull day. Some animals casually described as nocturnal are in fact crepuscular. [2] Special classes of crepuscular behaviour include matutinal, or "matinal", animals active only in the dawn, and vespertine, only in the dusk.
Why exactly do we get goosebumps when we're cold or experiencing strong emotions? Here’s what experts say.
Electroreceptive animals use the sense to locate objects around them. This is important in ecological niches where the animal cannot depend on vision: for example in caves, in murky water, and at night. Electrolocation can be passive, sensing electric fields such as those generated by the muscle movements of buried prey, or active, the ...
At night organisms are in the top 100 metres of the water column, but during the day they move down to between 800 and 1000 meters. If organisms were to defecate at the surface it would take the fecal pellets days to reach the depth that they reach in a matter of hours.