The average temporal avalanche shape has been measured for earthquakes 6 and for dislocation avalanches in plastically deformed metals 7,8, but the primary experimental and theoretical focus has ...

In 1999, while sitting at a bus stop in Cuernavaca, Mexico, a Czech physicist named Petr Šeba noticed young men handing slips of paper to the bus drivers in exchange for cash. It wasn’t organized ...

I am writing to express my grave concern as to the current policies and practices of the U.S. government with regard to visas for scientists from Cuba. The president-elect of the Federation of Latin ...