A Fourier transform analysis of 2.5 million spectra in the Sloan Digital Sky Survey was carried out to detect periodic spectral modulations. Signals having the same period were found in only 234 stars overwhelmingly in the F2 to K1 spectral range. The signals cannot be caused by instrumental or data analysis effects because [various reasons...]
Finally, we consider the possibility, predicted in a previous published paper, that the signals are caused by light pulses generated by ETI to makes us aware of their existence. We find that the detected signals have exactly the shape of an ETI signal predicted in the previous publication and are therefore in agreement with this hypothesis. The fact that they are only found in a very small fraction of stars within a narrow spectral range centered near the spectral type of the Sun is also in agreement with the ETI hypothesis. However, at this stage, this hypothesis needs to be confirmed with further work.
So I had to click around awhile, but here's the actual paper:
For some of us, it makes a huge difference if we're reading the actual paper, or trying to understand the watered-down version on a click-bait site.
I think it says something about the American space program when NASA's twitter feed is largely remembering past missions.
After a week of trying to part with green tides in two outdoor swimming pools, Olympic officials over the weekend wrung out a fresh mea culpa and yet another explanation—neither of which were comforting. According to officials, a local pool-maintenance worker mistakenly added 160 liters of hydrogen peroxide to the waters on August 5, which partially neutralized the chlorine used for disinfection. With chlorine disarmed, the officials said that “organic compounds”—i.e. algae and other microbes—were able to grow and turn the water a murky green in the subsequent days. The revelation appears to contradict officials’ previous assurances that despite the emerald hue, which first appeared Tuesday, the waters were safe.
I would personally have avoided using the green pools, but that's just me.
There's no sense in being precise when you don't even know what you're talking about. -- John von Neumann