birdwatcher (birdwatcher) wrote,

Дважды хорошие новости

In a landmark discovery, researchers at Tel Aviv University have unraveled the metastatic mechanism of melanoma, the most aggressive of all skin cancers. According to a paper published today in the journal Nature Cell Biology, the scientists discovered that before spreading to other organs, a melanoma tumor sends out tiny vesicles containing molecules of microRNA. These induce morphological changes in the dermis in preparation for receiving and transporting the cancer cells. The researchers also found chemical substances that can stop the process and are therefore promising drug candidates.

Тhis past weekend, reports emerged that, in May 2015, a team of astronomers using Russia's huge RATAN-600 telescope had spotted an intriguing radio signal coming from the vicinity of the star HD 164595, which lies about 94 light-years from Earth. The signal was consistent with something an alien civilization might produce, astronomers said — but they stressed that there was probably a more prosaic explanation. Such reminders not to get too carried away were well placed, it turns out. "Subsequent processing and analysis of the signal revealed its most probable terrestrial origin," astronomer Yulia Sotnikova wrote in an update published today (Aug. 31) by the Special Astrophysical Observatory of the Russian Academy of Sciences. "It can be said with confidence that no sought-for signal has been detected yet." The May 2015 signal may have been caused by a Russian military satellite.

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