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Permian-Triassic extinction event
The Permian-Triassic (P-T or PT) extinction event, sometimes informally called the Great Dying, was an extinction event that occurred approximately 251.0 million years ago (mya), forming the boundary ... > more -
Fish farming
Fish farming is the principal form of aquaculture, while other methods may fall under mariculture. It involves raising fish commercially in tanks or enclosures, usually for food. A facility that ... > more -
Domestic sheep
The domestic sheep (Ovis aries), the most common species of the sheep genus (Ovis), is a woolly ruminant quadruped which probably descends from the wild mouflon of south-central and south-west Asia. ... > more -
Slaughterhouse
A slaughterhouse, also called an abattoir, is a facility where farm animals are killed and processed into meat products. Slaughtering animals on a large scale poses significant logistical problems ... > more -
Organic farming methods
Organic farming methods combine scientific knowledge and modern technology with traditional farming practices based on thousands of years of agriculture. In general, organic methods rely on naturally ... > more -
Polychlorinated biphenyl
Polychlorinated biphenyls (PCBs) are a class of organic compounds with 1 to 10 chlorine atoms attached to biphenyl. Although the physical and chemical properties vary widely across the class, PCBs ... > more -
Somatic cell
A somatic cell is generally taken to mean any cell forming the body of an organism. Somatic cells, by definition, are not germline cells. In mammals, germline cells are the sperm and ova (also known ... > more
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