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Left untreated, this event carries a high risk of stroke; after carotid endarterectomy, which has a low operative risk, there is a very low postoperative stroke rate." [ 43 ] However, the rate of subsequent stroke after amaurosis is significantly less than after a hemispheric TIA, therefore there remains debate as to the precise indications for ...
Crepuscular rays are noticeable when the contrast between light and dark is most obvious. Crepuscular comes from the Latin word crepusculum, meaning "twilight". [2] Crepuscular rays usually appear orange because the path through the atmosphere at dawn and dusk passes through up to 40 times as much air as rays from a high Sun at noon.
The dark area above the center of the solar disk is a sunspot. The antumbra (from the Latin ante "before" and umbra "shadow") is the region from which the occluding body appears entirely within the disc of the light source.
In clear, tropical water sunlight can penetrate deeper and so the aphotic zone starts at greater depths. Around the poles, the angle of the sunlight means it does not penetrate as deeply so the aphotic zone is shallower. If the water is turbid, suspended material can block light from penetrating, resulting in a shallower aphotic zone. [4]
A pod of sea creatures stunned onlookers on a cruise through Alaska’s Glacier Bay National Park and Preserve, photos show. The scene was so stunning it took their breath away, the National Park ...
Init-init: the Itneg god of the Sun married to the mortal Aponibolinayen; during the day, he leaves his house to shine light on the world [7] Chal-chal: the Bontok god of the Sun whose son's head was cut off by Kabigat; [8] aided the god Lumawig in finding a spouse [9] Mapatar: the Ifugao sun deity of the sky in charge of daylight [10]
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At 7:15 a.m. EDT on Saturday, July 8, around 99% of the Earth's population will see sunlight in the sky - as long as it isn't cloudy. This equates to approximately 7.9 billion people across North ...