'Cosmic Eye' viral video gives viewers a new perspective on their world
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A different way to teach astrophysics

After a four-year-old video about astrophysics went viral, the scientist who made it speaks to the BBC.

Four years ago, Dr Danail Obreschkow, an astrophysicist in Perth, made a video to help explain science to a group of students who had never studied it before. The video has been online ever since.

Ten days ago it went viral and it's now been viewed almost 40 million times. He spoke to the BBC about it.