Astronomers send a new message to the stars to commemorate Drake-Sagan signal

Thirty-five years ago, astronomers Carl Sagan and Frank Drake used the Arecibo radio telescope to send a coded message to the stars in the hopes that an alien civilization would intercept it. We never did get an answer, but to commemorate the event, someone decided it was time to send a new message, but this time to put more thought into it. Here is the two-part story of how they formulated their message and how they had to improvise with an iPhone to actually send it.

Other scientists have their own thoughts on better ways to encode messages that could be deciphered by extraterrestrial intelligences.

It seems unlikely that anyone will ever receive those signals, but the search for ET continues. All sorts of techniques have been proposed and practiced over the years, but one new approach is to look for signs of the pollution that they emit, not the chemical kind, but the light pollution that is emitted from their planets. Of course, that presumes that they artificially light their cities. What if they can "see" across all wavelengths?

Closer to home, researchers are working on techniques for humans to communicate with each other in space by creating an internet-like network that will move data packets between satellites in orbit. I wonder if those ETs will ever be able to spot that.