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Packed but greener than many: The mass transit system in Delhi contributes to its lower-than-average carbon footprint ranking. Stephan Rebernik

How green is your city: towards an index of urban sustainability

Emerging research looks at new ways to measure the ecological footprint of cities, a key step to making them more environmentally benign and perhaps more livable.
Through his music, Lead Belly rejected the stereotype that country music was the domain of white artists, while blues music was reserved for blacks. Tamiment Library/Robert F. Wagner Labor Archives

Lead Belly’s music defied racial categorization

Lead Belly: The Smithsonian Folkways Collection depicts the fully-formed artist – a blues musician, yes, but also a performer of string-band, country and pop songs.
Game theory needs to evolve to make sense of the complexity of what drives us to cooperate. from www.shutterstock.com

New take on game theory offers clues on why we cooperate

Recent research suggests a new way to look at the famous prisoner’s dilemma and how the results could help us better understand human behavior and encourage cooperation.
Some of the earliest applications of photography came in the fields of archaeology and botany. Pictured is a photograph from botanist Anna Atkins’ Photographs of British Algae: Cyanotype Impressions (1843).

How photography evolved from science to art

Because a photograph came from a machine – not a human hand – many were not entirely sure if it could be called art.
Students on college campuses in a number of college campuses are pressuring universities to divest from fossil fuel companies. Will professors follow? maisa_nyc/Flickr

College fossil fuel divestment: the view from the lectern

A university professor active in the campaign to divest universities from fossil fuels shares his story, his motivations and arguments for divestment.
Leonard Nimoy, who played Spock in the Star Trek series, died on Feb. 27 Nimoy star image via www.shutterstock.com

Temple Grandin: The effect Mr. Spock had on me

Temple Grandin is perhaps the world’s foremost advocate on autism. But before she became famous, she was an awkward young girl who found solace in Mr. Spock’s logical world view in TV’s Star Trek.