The second test launch of the SpaceX Falcon 1 rocket took place today at 6:10 pm PST. After successfully having completed launch, first stage separation (2m 51s), second stage ignition (2m 55s), fairing separation (3m 16s), and reaching an altitude of 300 km, the vehicle was seen entering what is referred to as roll oscillations (4m 30s). Shortly thereafter, telemetry was lost. The second stage is assum

Mathematicians have mapped the inner workings of one of the most complicated structures ever studied: the object known as the exceptional Lie group E8. This achievement is significant both as an advance in basic knowledge and because of the many connections between E8 and other areas, including string theory and geometry. The magnitude of the calculation is staggering: the answer, if written out in tiny print, would cover an area the size of Manhattan. Mathematicians are known for their solitar