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  • The Amphibians Quiz | Britannica.com
    higher your score When you re done try again to beat your best score vm state secondsLeft fixedLength 2 QUESTION vm state currentQuestion 1 of vm questions length Timer Score vm state score All About Amphibians vm state secondsLeft fixedLength 2 QUESTION vm state currentQuestion 1 of vm questions length Timer Score vm state score All About Amphibians 0 vm state nextLabel Quiz Results All About Amphibians vm state numberCorrect vm questions length correct vm state score vm maxPoints points Replay Share your score Log in to save your score Animals Crustaceans Fact or Fiction Philosophy Religion Holidays and Festivals Which Religion History Southeast Asia Fact or Fiction Geography States of America Fact or Fiction Pop Culture The World of Woody Allen Are you a Quizmaster Log in to save your score and compete against the community Compare your score Max Score vm maxPoints New Best Score vm state score vm communityAverage number 0 Your Score Community Average High scores Your results vm state responsesVisible Hide Show Answers Questions Correct vm state numberCorrect vm questions length Total Score vm state score vm maxPoints Question Question index 1 Your Answer No response vm state responses index isCorrect Your Correct Answer Back

    Original URL path: http://www.britannica.com/quiz/all-about-amphibians (2016-02-13)
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  • Animals Fact or Fiction Quiz | Britannica.com
    you answer the higher your score When you re done try again to beat your best score vm state secondsLeft fixedLength 2 QUESTION vm state currentQuestion 1 of vm questions length Timer Score vm state score Animals Fact or Fiction vm state secondsLeft fixedLength 2 QUESTION vm state currentQuestion 1 of vm questions length Timer Score vm state score Animals Fact or Fiction 0 vm state nextLabel Quiz Results Animals Fact or Fiction vm state numberCorrect vm questions length correct vm state score vm maxPoints points Replay Share your score Log in to save your score Animals The Bug Eyed Quiz History The Ottoman Empire Geography Journey Through Europe Fact or Fiction Science Microeconomics Basics Pop Culture Leonardo DiCaprio Are you a Quizmaster Log in to save your score and compete against the community Compare your score Max Score vm maxPoints New Best Score vm state score vm communityAverage number 0 Your Score Community Average High scores Your results vm state responsesVisible Hide Show Answers Questions Correct vm state numberCorrect vm questions length Total Score vm state score vm maxPoints Question Question index 1 Your Answer No response vm state responses index isCorrect Your Correct Answer Back to Top Food

    Original URL path: http://www.britannica.com/quiz/animals-fact-or-fiction (2016-02-13)
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  • Ultimate Animals Quiz | Britannica.com
    try again to beat your best score vm state secondsLeft fixedLength 2 QUESTION vm state currentQuestion 1 of vm questions length Timer Score vm state score Ultimate Animals Quiz vm state secondsLeft fixedLength 2 QUESTION vm state currentQuestion 1 of vm questions length Timer Score vm state score Ultimate Animals Quiz 0 vm state nextLabel Quiz Results Ultimate Animals Quiz vm state numberCorrect vm questions length correct vm state score vm maxPoints points Replay Share your score Log in to save your score Animals Bats What Vampires Don t Want You To Know History Wars Throughout History Fact or Fiction Society Yemen Quiz Sports Recreation Swords Fact or Fiction Arts Culture Ballet Fact or Fiction Are you a Quizmaster Log in to save your score and compete against the community Compare your score Max Score vm maxPoints New Best Score vm state score vm communityAverage number 0 Your Score Community Average High scores Your results vm state responsesVisible Hide Show Answers Questions Correct vm state numberCorrect vm questions length Total Score vm state score vm maxPoints Question Question index 1 Your Answer No response vm state responses index isCorrect Your Correct Answer Back to Top Science Space Odyssey Philosophy Religion

    Original URL path: http://www.britannica.com/quiz/ultimate-animals-quiz (2016-02-13)
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  • 5 (so far) Moons of Pluto | Britannica.com
    50 heads but most sources give him three Ancient Greek pottery often depicts him with only two heads The last of the 12 labours of Hercules Heracles was to take Kerberos from the Underworld to Mycenae On a noted Caeretan hydria vase in the Louvre the dog is shown with three heads and enhanced by several coiled serpents 4 Hydra v0v Fotolia In Greek legend Hydra was a monster with nine or so heads the number varies among sources With Kerberos Cerberus the Hydra was said to guard the entrance to the Underworld The Roman poet Statius calls Hydra the comrade of the cruel beast Kerberos Cerberus There is mention in Greek mythology of a second Hydra the Lernaian Hydra whose killing was the second labour of Hercules Heracles It was a task complicated by the fact that each time one head was cut off two grew in its place Well you probably can guess that once Heracles figured out the solution to that problem Hydra lost But the Hydra had the last word as it were if you believe Sophocles see Trachinian Women 3 Nix Here is a little lesson in the value of variant names in Greek mythology Nyx is the female personification of night and a great cosmological figure awesome even to Zeus himself According to the Greek poet Hesiod she was the daughter of Chaos and the mother of Sleep Death the Fates Nemesis and Old Age Surely to be feared She was also the mother of Charon Alas when her name was presented as a possibility for the moon s name Nyx so spelled had already been assigned to an asteroid Never daunted astronomers simply used a variant spelling and voilà 2 Charon Photos com Thinkstock Charon the name of Pluto s largest moon is a ferryman in the service of Pluto or Hades It was Charon s duty to guide the souls of the deceased when properly buried over the Rivers Styx and Acheron As payment for this act he received the coin that ancient Greeks placed in the mouth of the deceased He is a popular figure in early art and literature Aristophanes Frogs and Virgil Aeneid Book VI wrote about him as did Lucian His character is an integral part of The Invention of Love playwright Tom Stoppard s portrait of the 20th century poet A E Housman 1 Pluto Anderson Alinari Art Resource New York Yes Pluto is the name of Mickey Mouse s dog However the recently reclassified dwarf planet is named for the Roman god of the Underworld better known to the Greeks as Hades Hmm Underworld and outer space A somewhat ironic name no After Cronus king of the Titans died his kingdom was divided by lots The Sea became the realm of Poseidon the Sky or Heavens of Zeus and the Underworld fell to Hades He became the god of the dead and soon death personified He is said to have abducted Persephone and to have given

    Original URL path: http://www.britannica.com/list/5-so-far-moons-of-pluto (2016-02-13)
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  • 7 Drugs that Changed the World | Britannica.com
    Drug Enforcement Administration The introduction of the tranquilizer chlorpromazine also known as thorazine in the 1950s represented a turning point in psychiatry one that gave rise to the psychopharmacological revolution Indeed not only was chlorpromazine successful by 1964 some 50 million people had taken the drug but its development also laid the groundwork for the later generation of agents used in the treatment of anxiety and depression Furthermore the characterization of its effects on neurotransmitters and their receptors provided insight into how impulses are passed from one neuron to the next in the brain leading to major advances in scientists understanding of mental illness and cognition 4 From Chemical Warfare to Cancer Ed Uthman MD Nitrogen mustards were developed in the 1920s and 30s as agents of chemical warfare By the 1940s however it had become clear that at least one of these compounds HN 2 also known as mechlorethamine was better suited for use in the fight against cancer specifically against human lymphomas than it was in the fight between Axis and Allied powers In 1949 mechlorethamine became the first drug approved by the U S Food and Drug Administration for the treatment of cancer 3 So Retro That Is Antiretroviral James Keyser Time Life Pictures Getty Images The U S Food and Drug Administration s approval in 1987 of zidovudine more widely known as AZT was a breakthrough in the treatment of HIV AIDS While not able to cure the disease the drug was found to prolong the lives of AIDS patients It also was the first of the so called nucleoside reverse transcriptase inhibitors a group of antiretroviral drugs that became a cornerstone of HIV AIDS therapy Owing to these drugs and perhaps most significantly to increased access to these drugs in countries worldwide the annual number of deaths from AIDS declined in the early 21st century 2 Population Control cristi180884 Shutterstock com In the early 1920s Austrian scientist Ludwig Haberlandt published a paper suggesting that hormones could be used as an effective means of contraception in animals While it is unclear he may have soon after tested a hormone preparation in clinical trials despite heavy criticism from colleagues who considered contraception to be taboo Haberlandt s work however came to an abrupt end with his suicide in 1932 Two decades passed before further clinical trials of hormonal contraception were conducted in humans and then largely at the urging of social activist Margaret Sanger The first birth control pill was approved in 1960 in the United States 1 A Life Saving Contaminant Carlo Bevilacqua SCALA Art Resource New York In 1928 Scottish bacteriologist Alexander Fleming was in the process of sterilizing bacterial culture plates that had become contaminated with mold when he noticed clear zones circling mold colonies The mold toxin responsible for killing the bacteria turned out to be penicillin which Australian pathologist Howard Walter Florey and British biochemist Ernst Boris Chain later successfully isolated and purified to produce what became arguably the world s most

    Original URL path: http://www.britannica.com/list/7-drugs-that-changed-the-world (2016-02-13)
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  • Ortega y Gasset, José | Encyclopedia Britannica
    Ortega y Gasset Gis le Freund MEDIA FOR Jos é Ortega y Gasset Citation MLA APA Harvard Chicago Email To From Comment You have successfully emailed this Error when sending

    Original URL path: http://www.britannica.com/biography/Jose-Ortega-y-Gasset/images-videos/Ortega-y-Gasset/13295 (2016-02-13)
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  • Spain | history - geography | Britannica.com
    Cordillera Sistema Ibérico to the northeast and east the Sierra Morena to the south and the lower mountains of the Portuguese frontier and Spanish Galicia to the northwest The Pyrenees run across the neck of the peninsula and form Spain s border with France There are two major depressions that of the Ebro River in the northeast and that of the Guadalquivir River in the southwest In the southeast the Baetic Cordillera Sistema Penibético runs broadly parallel to the coast to merge with the mountains of the Iberian Cordillera Along the Mediterranean seaboard there are coastal plains some with lagoons e g Albufera south of Valencia Offshore in the Mediterranean the Balearic Islands are an unsubmerged portion of the Baetic Cordillera The Canary Islands in the Atlantic are of volcanic origin and contain the highest peak on Spanish territory Teide Peak which rises to 12 198 feet 3 718 metres on the island of Tenerife Spain has some of the oldest as well as some of the youngest rocks of Europe The entire western half of Iberia with the exception of the extreme south is composed of ancient Hercynian rocks geologists refer to this Hercynian block as the Meseta Central It constitutes a relatively stable platform around which younger sediments accumulated especially on the Mediterranean side In due course these sediments were pushed by major earth movements into mountain ranges The term meseta is also used by geographers and local toponymy to designate the dominating relief unit of central Iberia As a result the Meseta Central defined by relief is subdivided by geology into a crystalline west granites and gneisses and a sedimentary east mainly clays and limestones The northern Meseta Central which has an average elevation of 2 300 feet 700 metres corresponds to the tablelands or plateau of Castile and León although it is in fact a basin surrounded by mountains and drained by the Douro Duero River The southern Meseta Central the Meseta of Castile La Mancha is some 330 feet 100 metres lower Its relief is more diverse however owing to heavy faulting and warping caused by volcanic activity around the Calatrava Plain and to two complex river systems the Guadiana and the Tagus separated by mountains Its southern plains rise gradually to the Sierra Morena The southeastern side of this range drops almost vertically by more than 3 300 feet 1 000 metres to the Guadalquivir depression Dividing the northern and southern Mesetas are the Central Sierras one of the outstanding features of the Iberian massif Their highest points Peñalara Peak at 7 972 feet 2 430 metres and Almanzor Peak at 8 497 feet 2 590 metres rise well above the plains of the central plateau In contrast the granitic Galician mountains at the northwestern end of the Hercynian block have an average elevation of only 1 640 feet 500 metres decreasing toward the deeply indented ria coast of the Atlantic seaboard Pyrenees Spain age fotostock Part of Alpine Europe the Pyrenees form a massive mountain range that stretches from the Mediterranean Sea to the Bay of Biscay a distance of some 270 miles 430 km The range comprises a series of parallel zones the central axis a line of intermediate depressions and the pre Pyrenees The highest peaks formed from a core of ancient crystalline rocks are found in the central Pyrenees notably Aneto Peak at 11 168 feet 3 404 metres but those of the west including Anie Peak at 8 213 feet 2 503 metres are not much lower The mountains fall steeply on the northern side but descend in terraces to the Ebro River trough in the south The outer zones of the Pyrenees are composed of sedimentary rocks Relief on the nearly horizontal sedimentary strata of the Ebro depression is mostly plain or plateau except at the eastern end where the Ebro River penetrates the mountains to reach the Mediterranean Sea A series of sierras trending northwest southeast forms the Iberian Cordillera which separates the Ebro depression from the Meseta and reaches its highest elevation with Moncayo Peak at 7 588 feet 2 313 metres In the southeast the Iberian Cordillera links with the Baetic Cordillera also a result of Alpine earth movements Although more extensive more than 500 miles 800 km long and up to 150 miles 240 km wide and with peninsular Spain s highest summit Mulhacén Peak at 11 421 feet 3 481 metres the Baetic ranges are more fragmented and less of a barrier than the Pyrenees On their northern and northwestern sides they flank the low lying and fairly flat Guadalquivir basin the average elevation of which is only 426 feet 130 metres on mainly clay strata Unlike the Ebro basin the Guadalquivir depression is wide open to the sea on the southwest and its delta has extensive marshland Las Marismas Drainage Júcar River Robert Frerck Odyssey Productions Although some maintain that aridity rivals civil war as the chief curse of historic Spain the Iberian Peninsula has a dense network of streams three of which rank among Europe s longest the Tagus at 626 miles 1 007 km the Ebro at 565 miles 909 km and the Douro at 556 miles 895 km The Guadiana and the Guadalquivir are 508 miles 818 km and 408 miles 657 km long respectively The Tagus like the Douro and the Guadiana reaches the Atlantic Ocean in Portugal In fact all the major rivers of Spain except the Ebro drain into the Atlantic Ocean The hydrographic network on the Mediterranean side of the watershed is poorly developed in comparison with the Atlantic systems partly because it falls into the climatically driest parts of Spain However nearly all Iberian rivers have low annual volume irregular regimes and deep valleys and even canyons Flooding is always a potential hazard The short swift streams of Galicia and Cantabria draining to the northwestern and northern coasts respectively have only a slight or at most modest summer minimum The predominant fluvial regime in

    Original URL path: http://www.britannica.com/place/Spain (2016-02-13)
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  • Marburg | Germany | Britannica.com
    on the Philipps University of Marburg founded 1527 Germany s first Protestant university German and other dramatic classics are produced annually at a festival in the open air theatre on the castle grounds Pop 2003 est 78 511 Comments Share Email Print Cite You may also be interested in Giessen Europe Frankfurt am Main Kassel Wiesbaden Fulda Darmstadt Hanau Lorsch Offenbach Rüdesheim Bad Homburg Keep exploring Capitals Cities Fact or Fiction Hit the Road Quiz World Cities 7 Scary Surgical Instruments Then and Now Trivia with a Capital Tea 5 Things You Didn t Know About Tea What made you want to look up Marburg To From Subject Comments Please limit to 900 characters Cancel Britannica Stories Behind The News Philosophy Religion Healing the Schism Pope Meets Patriarch Behind The News Science Gravitational Waves Observed Spotlight History Thomas Malthus s 250th Birthday See More Stories FEATURED QUIZZES Vocabulary Quiz True or False Spell It See More Quizzes About Us About Our Ads Contact Us Privacy Policy Terms of Use 2016 Encyclopædia Britannica Inc MLA style Marburg Encyclopædia Britannica Encyclopædia Britannica Online Encyclopædia Britannica Inc 2016 Web 12 Feb 2016 http www britannica com place Marburg Germany APA style Marburg 2016 In Encyclopædia Britannica Retrieved from http www britannica com place Marburg Germany Harvard style Marburg 2016 Encyclopædia Britannica Online Retrieved 12 February 2016 from http www britannica com place Marburg Germany Chicago Manual of Style Encyclopædia Britannica Online s v Marburg accessed February 12 2016 http www britannica com place Marburg Germany While every effort has been made to follow citation style rules there may be some discrepancies Please refer to the appropriate style manual or other sources if you have any questions Update Link Click anywhere inside the article to add text or insert superscripts subscripts and special characters

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