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Matutinal animals are active only after dawn, and vespertine only before dusk. A number of factors affect the time of day an animal is active. Predators hunt when their prey is available, and prey try to avoid the times when their principal predators are at large. The temperature may be too high at midday or too low at night. [2]
Sungazing is the unsafe practice of looking directly at the Sun.It is sometimes done as part of a spiritual or religious practice, most often near dawn or dusk. [1] The human eye is very sensitive, and exposure to direct sunlight can lead to solar retinopathy, pterygium, [2] cataracts, [3] and potentially blindness.
Civil dawn is preceded by morning nautical twilight and civil dusk is followed by evening nautical twilight. Civil twilight in a small town in the Mojave Desert. Under clear weather conditions, civil twilight approximates the limit at which solar illumination suffices for the human eye to clearly distinguish terrestrial objects.
Image credits: Ross Burgener Meanwhile, for Dr. Brandon, the most beautiful natural phenomenon is the northern lights, whereas the most fascinating is the diel vertical migration.
The blue shark (Prionace glauca) is a predator that primarily hunts during the pre-dawn to dawn period. [5] During matutinal hours, they spend more time than any other point in the day at the surface of the ocean. [5] It is likely that they are taking advantage of the increased density of prey at the water's surface during dawn. [6]
Blue hour at the Old Cathedral of the Holy Name of Jesus, Bragança in Portugal. The blue hour (from French l'heure bleue; [1] [a] pronounced [lœʁ blø]) is the period of twilight (in the morning or evening, around the nautical stage) when the Sun is at a significant depth below the horizon.
Dawn begins with the first sight of lightness in the morning, and continues until the Sun breaks the horizon. The morning twilight is divided in three phases, which are determined by the angular distance of the centre of the Sun ( degrees below the horizon) in the morning .
By Food52 It happens every afternoon: Around 4 o'clock, I start to fade and begin considering my caffeine options, always landing on the abandoned, half-consumed coffee at my desk. Every morning ...