(Encore episode) The mirror self-recognition test has been around for decades. Only a few species have what it takes to recognize themselves, while others learn to use mirrors as tools. NPR science correspondent Nell Greenfieldboyce talks us through mirror self-recognition and why Maddie's
dog is staring at her.
For more science reporting and stories, follow Nell on twitter
@nell_sci_NPR. And, as always, email us at
shortwave@npr.org.
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