[jeppz]

Wait, am I crazy or is that metal strip actually not a Mobius?

[trampi]

as far as I can tell: no, it does not seem to be a Mobius.

Edit: They did change the image. In the last image, they showed a metal surface which wrapped two times and had not the properties of a mobius strip.

Edit 2: found it, the old image was this stock image: https://www.istockphoto.com/de/foto/moebius-streifen-in-meta...

[coldtea]

>Edit: They did change the image. In the last image, they showed a metal surface which wrapped two times and had not the properties of a mobius strip.

This is still a single-sided surface though (with the 2 twists).

Wikipedia: "the Möbius strip can also be formed by twisting the strip an odd number of times greater than one"

Not sure about needing to be "odd", I think 2 qualifies as well, so perhaps odd or even AND prime does it...

[jackcarter]

No, it has two sides. Pick a side and trace it with your finger - you'll never get to the other side.

(I'm talking about this image, from the second edit: https://www.istockphoto.com/de/foto/moebius-streifen-in-meta... )

[coldtea]

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.

[jacobush]

It looks kind of swirly and hidden but it must be... but I couldn't trace it in my mind for some reason!

[ocfnash]

It is a Mobius strip.

To convince yourself it might be useful to imagine a point on the surface and imagine tracing it along the strip (avoiding the edges) and seeing if you get back to where your started.

[ioulian]

They've changed the image, quickly, but this was the previous image, which is not a Möbius strip:

https://www.alamy.com/stock-photo-metallic-moebius-strip-iso...

[avip]

Fantastic! They even coloured the faces to emphasize the fact it is NOT, in fact, a Mobius strip.

[orian]

It's not xD