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Featured Article: Poison dart frogPoison dart frog (also poison arrow frog, dart frog, or poison frog) is the common name for any of the very small, diurnal frogs of the Dendrobatidae family. Their common name refers to the poisons contained within their skin that are used by local tribes to coat their blowgun darts. The family name Dendrobatidae and the genus name Dendrobates are derived from the Greek words dendro, meaning "tree," and bates, meaning "walker"; thus literally "tree walker" (Schlager 2003).
Many of these poison frogs are brightly colored with combinations of orange, blue, red, yellow, or black pigments; however, the majority are not brightly colored and are referred to as cryptically colored. Although the secretions from all of these frogs are poisonous, only a few species have enough poison to kill a human being (Patocka et al. 1999).
Many new poisonous alkaloids found within their skin are now being used to study the neurophysiology of nerve and muscle transmission. The discovery of epibatidine as a pain reliever 200 times more potent than morphine has stimulated research on a new class of compounds that may help many people overcome pain without the side effects of addiction.
Popular Article: ManilaThe City of Manila (Filipino: Lungsod ng Maynila), or simply Manila, is the capital of the Philippines and one of the municipalities that comprise Metro Manila. The city is located on the eastern shore of Manila Bay on Luzon, the country's largest island. Manila is the hub the Metro Manila area, also known as the National Capital Region (NCR), a thriving metropolitan area consisting of seventeen cities and municipalities which is home to over 10 million people. Manila is the second most populous city proper in the Philippines, with more than 1.5 million inhabitants. Only nearby Quezon City, the country's former capital, is more populous.
The name Manila comes from may nilad, Tagalog for "there is nilad," referring to the flowering mangrove plant that grew on the marshy shores of the bay. In the sixteenth century, Manila (then Maynilad) grew from an Islamic settlement on the banks of the Pasig River into the seat of the colonial government of Spain when it controlled the Philippine Islands for over three centuries from 1565 to 1898. After the end of the Spanish-American War in 1898, the United States occupied and controlled the city and the Philippine archipelago until 1946. During World War II, much of the city was destroyed. The Metropolitan Manila region was enacted as an independent entity in 1975. Today, the city and the metropolis thrive as an important cultural and economic center. However, overpopulation, traffic congestion, pollution, and crime challenge the city.
Manila has been classified as a "Gamma" global city by the Globalization and World Cities Study Group and Network.
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