The firefly is an insect which is particularly known for its characteristic luminescence. This animal has special abdominal organs,

The reason for this behavior on the part of ostriches is ignored by everyone, why? Simple … because it’s false! Indeed, the popular belief that ostriches put their heads in the sand in case of danger, is wrong and has never been recorded.
However, when there is no other possibility of escape evident, a bird can lie down on the ground with head and neck stretched forward and remain firm in the hope that it is ignored by his enemy. This strategy has similarly taken by a bird in hatching …

The visible white light coming from the Sun is composed from superposition of electromagnetic waves of different wavelengths ranging from the radiation that we perceive as violet, to the radiation that we recieve as red then blue, green, yellow, orange. The dust particles and droplets of water present in the atmosphere are much larger than the wavelength of visible light: in this case the light is reflected in all directions equally, regardless of its wavelength. The gas molecules are smaller and the light behaves differently depending on its wavelength. The …

A portion of the brain that plays an important role in triggering the yawn is the hypothalamus (where are also guarded the centers that synchronize sleep and wakefulness, hunger and thirst, body temperature). In particular, some neurotransmitters (including dopamine) and neuropeptide have an important role in stimulating this behavior. Yawn is a stereotyped behaviour and there are not differences of sex, race, age in the way you yawn: there is a long inhalation followed by a brief exhalation during which it is very difficult, almost impossible, to avoid opening your …