In what year was the album “Polaris” released by Tesseract?

In what year was the album “Polaris” released by Tesseract?: The album “Polaris” was released in 2015 by Tesseract, featuring 9 tracks.
What is the most successful song from the album “Polaris” by Tesseract?: “Tourniquet” is the biggest hit from the album “Polaris” by Tesseract.

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