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Caffeine is a central nervous system (CNS) stimulant of the methylxanthine class. [9] It is mainly used as a eugeroic ( wakefulness promoter) or as a mild cognitive enhancer to increase alertness and attentional performance. [10] [11] Caffeine acts by blocking binding of adenosine to the adenosine A 1 receptor, which enhances release of the ...
The Inaccessible Island rail ( Laterallus rogersi) is a bird found only on Inaccessible Island in the South Atlantic Tristan archipelago. This rail, the smallest extant flightless bird, was described by physician Percy Lowe in 1923. The adult has brown plumage, a black bill, black feet, and red eyes. It occupies most habitats on the island ...
The capybara[a] or greater capybara (Hydrochoerus hydrochaeris) is a giant cavy rodent native to South America. It is the largest living rodent[2] and a member of the genus Hydrochoerus. The only other extant member is the lesser capybara (Hydrochoerus isthmius). Its close relatives include guinea pigs and rock cavies, and it is more distantly ...
Pandemics timeline death tolls This is a list of the largest known epidemics and pandemics caused by an infectious disease.Widespread non-communicable diseases such as cardiovascular disease and cancer are not included. An epidemic is the rapid spread of disease to a large number of people in a given population within a short period of time; in meningococcal infections, an attack rate in ...
Current ISO 3166 country codes. The sortable table below contains the three sets of ISO 3166-1 country codes for each of its 249 countries, links to the ISO 3166-2 country subdivision codes, and the Internet country code top-level domains (ccTLD) which are based on the ISO 3166-1 alpha-2 standard with the few exceptions noted.
Arnold Alois Schwarzenegger (born July 30, 1947) is an Austrian and American actor, businessman, filmmaker, former politician, and former professional bodybuilder known for his roles in high-profile action movies. He served as the 38th governor of California from 2003 to 2011 and was among Time 's 100 most influential people in the world in 2004 and 2007.
Veganism is the practice of abstaining from the use of animal products—particularly in diet—and an associated philosophy that rejects the commodity status of animals.[c] A person who follows the diet or philosophy is known as a vegan. Distinctions may be made between several categories of veganism. Dietary vegans, also known as "strict ...
