Jigger (sand flea) infested foot. Tunga penetrans (chigoe flea or jigger) is a parasitic insect found in most tropical and sub-tropical climates. It is native to Central and South America, and has been inadvertently introduced by humans to sub-Saharan Africa. Synonyms for Tunga penetrans include Sarcopsylla penetrans, Pulex penetrates, and many others. In its parasitic phase it has significant impact on its host, which include humans and certain other mammalian species. A parasitical infestation of T. penetrans is called tungiasis.
According to data provided by the U.S. Navy Oceanography Portal (http://www.usno.navy.mil/USNO/as...), astronomical twilight lasts much longer (nearly 2 hours) during the summer compared to the winter months (only about 30-40 minutes).
Answers. Best Answer: In Anchorage, about 5.5 hours from sunrise to sunset in December. Useable twilight is another 1 to 1.5 on each end (low-angle sun takes a long time to full set) In June, 19.5 hours. Plus those hours of twilight. So you can read a book outside from 3 am to 1 am. Fairbanks is more extreme by a few hours. Juneau and Ketchikan, etc are between Anchorage and Seattle in both temps and light (but much wetter than either). On March 21 and September 21 (the equinoxes) everywhere is 12 hours daylight and 12 hours twilight+night.