4 ways aliens could be contacting Earth without us knowing

If there are extraterrestrials out there, they could be trying to make contact with us Earthlings, but due to our limited technology, we may miss all their mediums of communication. We spoke with Doug Vakoch, the president of the Messaging to Extra-Terrestrial Intelligence (METI), about the topic.

Here are four ways aliens could be contacting us.

 Produced by Delano Samuels and Jessica Orwig

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