Novel nanogenerator takes cue from electric eels

Researchers from the Beijing Institute of Nanoenergy and Nanosystems and the University of Chinese Academy of Sciences have developed a bionic stretchable nanogenerator (BSNG) that takes inspiration from electric eels.

Medical groups warn climate change is a 'health emergency'

As Democratic presidential hopefuls prepare for their first 2020 primary debate this week, 74 medical and public health groups aligned on Monday to push for a series of consensus commitments to combat climate change, bluntly ...

Spaceship Concordia

Science for the benefit of space exploration does not only happen off planet. While some studies require the weightless isolation of the International Space Station, another location provides the right conditions for investigating ...

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Drug

A drug, broadly speaking, is any substance that, when absorbed into the body of a living organism, alters normal bodily function. There is no single, precise definition, as there are different meanings in drug control law, government regulations, medicine, and colloquial usage.

In pharmacology, a drug is "a chemical substance used in the treatment, cure, prevention, or diagnosis of disease or used to otherwise enhance physical or mental well-being." Drugs may be prescribed for a limited duration, or on a regular basis for chronic disorders.

Recreational drugs are chemical substances that affect the central nervous system, such as opioids or hallucinogens. They may be used for perceived beneficial effects on perception, consciousness, personality, and behavior. Some drugs can cause addiction and/or habituation.

Drugs are usually distinguished from endogenous biochemicals by being introduced from outside the organism.[citation needed] For example, insulin is a hormone that is synthesized in the body; it is called a hormone when it is synthesized by the pancreas inside the body, but if it is introduced into the body from outside, it is called a drug.[citation needed] Many natural substances, such as beers, wines, and psychoactive mushrooms, blur the line between food and recreational drugs, as when ingested they affect the functioning of both mind and body and some substances normally considered drugs such as DMT (Dimethyltryptamine) are actually produced by the human body in trace amounts.

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