Even before I opened the link I had an inkling that this would be Michio Kaku level good for a documentary kind of sensationalism filled piece. I was not wrong.

Even before I opened the link I had an inkling that this would be Michio Kaku level good for a documentary kind of sensationalism filled piece. I was not wrong. While glancing through, I didn't come across any mention of "intent to communicate". Not sure if any of the links have. It seems like too much is made out of the act of "dropping off things", and perceived as communication. While it is something that we all have done in high school (or at work, sheesh) while analysing the actions of our crush to check for signals, I am pretty sure it has no place in science.