As part of a system like this, there should be a natural mechanism that provides space for risk-taking and research that pushes the envelope in bold ways that could unearth breakthroughs in education.

FORBES: The Counterproductive Attack on NYC's School of One

This process has the virtue of having a natural correction mechanism built in.

ECONOMIST: Education, education, education

Unlike those trying to fight the causes of ageing or to repair the damage done, Dr Sinclair thinks he has found, in caloric restriction as the technique is known, a specifically evolved natural anti-ageing mechanism that is quite compatible with disposable-soma theory.

ECONOMIST: Abolishing ageing

They contain a cyanide compound, a natural part of the plant's defense mechanism.

NPR: Falling in Love with Limas

In summary, Dr Saetre and his colleagues have vindicated Dobzhansky and thus confirmed a mechanism for the origin of species that is directly caused by natural selection, rather than being an accidental by-product of it.

ECONOMIST: Evolution

Xcel Energy is one company that opposes a national "cap-and-trade" mechanism on carbon dioxide emissions, partly out of concern that it will promote dependence on natural gas, which has history of price volatility.

FORBES: Magazine Article