Duo, the green cartoon owl mascot for language learning app Duolingo, has died, and singer Dua Lipa is grieving. The brand announced Duo’s passing on Tuesday, writing in a cheeky statement on th ...

Aly Lopez is a writer on the sleep team at CNET. She tests, researches and reviews everything sleep-related, from mattresses and bedding to sleep trends and hacks to sleep technology and supplements.

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