If you mean this picture they have in the article: http://ichef.bbci.co.uk/wwfea... | Hacker News

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coldtea on Oct 29, 2018 | parent | context | favorite | on: How one-sided objects like a Mobius strip work

If you mean this picture they have in the article:

http://ichef.bbci.co.uk/wwfeatures/wm/live/624_351/images/li...

it is. Why wouldn't it be? The single "twist" in the lower right part is the distinctive sign of one.

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