China’s lunar rover functioning day after being declared dead
The Guardian: A day after it was declared dead, China’s Jade Rabbit lunar rover communicated with the nation’s space program, state media reported Thursday.
After a night of extreme cold on the moon, China’s space program reported its first moon rover had lost function. Citing a combination of mechanical issues in addition to the low temperatures, the program reported the rover dead. However, on Thursday, the program said that “it came back to life.”
It is unclear how much function returned to the rover, but the program said it now believes it is possible to save it.
Photo: China’s Jade Rabbit moon rover after it landed on the lunar surface. (AP/Xinhua)
Population losers:The populations ofJapan, Russia and Germany are expected to decrease by more than 10% by 2050. For Japan, this means a loss of 19 million residents; for Russia, 23 million; and for Germany, 10 million.
By coaxing light out of a single polymer molecule, researchers have made the world’s tiniest light-emitting diode.
This work is part of an interdisciplinary effort to make molecular scale electronic devices, which hold the potential for creating smaller but more powerful and energy-efficient computers. Guillaume Schull and his colleagues at the University of Strasbourg in France made the device with the conducting polymer polythiophene. They used a scanning tunneling microscope tip to locate and grab a single polythiophene molecule lying on a gold substrate. Then they pulled up the tip to suspend the molecule like a wire between the tip and the substrate.
The researchers report in the journalPhysical Review Letters that when they applied a voltage across the molecule, they were able to measure a nanoampere-scale current passing through it and to record light emitted from it.