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The wind, sun, and biomass are three renewable energy sources.

In the United States, renewable energy sources were used in 2018 to provide abut 17% of total U.S. utility-scale electricity generation, mostly from hydroelectic power and wind, with smaller amounts from biomass, solar, and geothermal (EIA 2019).

Featured Article: Cannibalism

Cannibalism in Brazil in 1557, as described by Hans Staden

Cannibalism is the act or practice of eating members of one's own species and usually refers to human beings eating other humans (sometimes called anthropophagy). Cannibalism has been attributed to many different tribes and ethnicities in the past, but the degree to which it has actually occurred and been socially sanctioned is an extremely controversial topic in anthropology, owing to the severe taboo against its practice in most cultures. Some anthropologists have argued that cannibalism was almost non-existent and view claims of cannibalism with extreme skepticism, while others argued that the practice was common in pre-state societies.

Popular Article: Wasp

Basic morphology of a female yellowjacket wasp

Broadly defined, wasp is any insect of the order Hymenoptera and suborder Apocrita that is not a bee or ant. This includes more than 20,000 known species. A narrower but popular definition of the term is any member of the Aculeate family Vespidae, which includes (among others) the paper wasps, potter wasps, hornets, pollen wasps, and yellowjackets. Although wasps often are viewed as domestic nuisances or as dangers due to their stingers, in reality they provide a value function for the ecosystem and for human beings. Ecologically, they are important in food chains. Agriculturally, they offer a natural biocontrol of agricultural pests, since so many wasp species are parasites or predators of pest species.

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The first aviation facility to be called an "airport" was Bader Field in Atlantic City, New Jersey. (read more)

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