Now evidence suggests that this lightest of metals has been realized, but in an unexpected form. Measuring distances to more supernovae sharpens the Hubble constant debate. Measuring the Hubble constant with supernovae continues to suggest an older universe than one gets with other yardsticks. Model sheds light on a tragedy and a new type of eruption. Ten years after a natural disaster in Cameroon killed 1746 people, a new model adds support to the hypothesis that the culprit was a previously unknown type of nonvolcanic eruption.
Researchers vie to achieve a quantum-dot laser.