Canadian YouTuber NileRed shows how he made a thin piece of balsa wood transparent. The video has picked up more than 2 million views since it was uploaded last week.

The video is long - 43 minutes - and fairly technical (NileRed has a degree in biochemistry). But he tries hard to present it in a simple fashion. All required chemicals were purchased through Amazon.

NileRed's YouTube channel is huge. He's amassed more than 300 million views across all his videos.