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The human digestive system consists of the gastrointestinal tract plus the accessory organs of digestion (the tongue, salivary glands, pancreas, liver, and gallbladder). ...
Air pollution is the introduction of airborne chemicals, particulate matter or biological materials that cause harm or discomfort to organisms. [59] The population growth , industrialization and motorization of human societies have significantly increased the amount of airborne pollutants in the Earth's atmosphere, causing noticeable problems ...
Earth's air has a density of approximately 10 19 molecules per cubic centimeter; by contrast, the densest nebulae can have densities of 10 4 molecules per cubic centimeter. Many nebulae are visible due to fluorescence caused by embedded hot stars, while others are so diffused that they can be detected only with long exposures and special filters.
Earth is the third planet from the Sun and the only astronomical object known to harbor life.This is enabled by Earth being an ocean world, the only one in the Solar System sustaining liquid surface water.
Water is an inorganic compound with the chemical formula H 2 O.It is a transparent, tasteless, odorless, [c] and nearly colorless chemical substance.It is the main constituent of Earth's hydrosphere and the fluids of all known living organisms (in which it acts as a solvent [20]).
Heather Locklear still has a lot of love for her ex David Spade. On Friday, Dec. 6, the actress, 63, made a rare appearance at Steel City Con in Monroeville, Pa., where she participated in a Q&A ...
Ticket-splitting used to be common and the swing-state down-ballot results show split tickets still can determine the outcome of key races.
From January 2008 to December 2012, if you bought shares in companies when John S. Brinzo joined the board, and sold them when he left, you would have a -19.4 percent return on your investment, compared to a -2.8 percent return from the S&P 500.