Is this a signal from an alien civilization? Almost always the answer is "no". But here is an intriguing signal that astronomers are puzzled by. It is coming from the direction of the star closest to our Sun, Proxima Centauri. We also know that it hosts an Earth-sized planet in its habitable zone. So there are a lot of things going its favor. Plus the nature of the signal suggests that it is likely not produced by any natural phenomenon. Please join astrophysicist Salman Hameed in exploring what we know about this mystery. 

Video episode here: https://youtu.be/IQxZAU-4kYI