October 5, 2017

When it comes to sex, women are faced with a lack of hard facts. Consider the existence of an anatomical area known as the Gräfenberg spot (G-spot). Eleventh-century Indian texts and Cosmopolitan magazine seem sure it exists, and imaging studies of blood flow support i...

August 9, 2017

PhD students in Luiz Davidovich's quantum-optics laboratory at the Federal University of Rio de Janeiro (UFRJ) in Brazil are afraid to turn on the lab's main laser in case it malfunctions. Davidovich encourages them to be extremely careful. “If it breaks — and lasers d...

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