Low-frequency radio emissions from high-altitude sprite discharge

When lightning strikes from a towering cumulonimbus cloud down to the ground, the electrical discharge can perturb the atmosphere's electric field, potentially triggering a second event-sprite discharge. This more elusive ...

Samsung is top 2012 phone brand, ousting Nokia

Samsung has overtaken Nokia as the top mobile phone brand for 2012 and has opened up a decisive lead over Apple in the smartphone market, a research firm said Tuesday.

Are we closing in on dark matter?

As the search for dark matter intensifies, the Kavli Institute for Cosmological Physics at the University of Chicago and the National Academy of Sciences organized a colloquium that brings together cosmologists, particle ...

Ozone levels have sizeable impact on worker productivity

Researchers in the Department of Health Policy and Management at Columbia's Mailman School of Public Health assessed the impact of pollution on agricultural worker productivity using daily variations in ozone levels. Their ...

US to study privacy impact of data brokers

US regulators Tuesday ordered data brokers to turn over information about how they collect and use information about consumers, in a move hailed by Internet privacy activists.

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