
It does "exactly what it says on the tin" - namely, it turns a webpage into a PDF file which you can save to your own system. The file includes all the links from the page.
Here's the Chace School website that has been saved as a 'pdf'.

Watch the video and be amazed that the grey diamond shapes in the pattern are actually all the same shade of grey.
The previous posting made note of the use of fibre optic cables which use light to transmit data - this post concerns the use of light - or at least the way our eyes and brains interpret light - in an optical illusion.
Originally found via BoingBoing here.
Here's another illusion which I came across since I first prepared this post a few months ago.

Wired magazine produced a short article showing a little bit about the journey of data bits from the UK, across the Atlantic Ocean and USA mainland to a destination in California.
And all via fibre optic cables.
The map below shows Southport on the north-west coast of England where the data leaves these shores via the Hibernia Atlantic UK network.

In the picture above, on the right, you can see a small, working, solar-powered, brass engine. (The spectacles are to provide a proper appreciation for the size of the model.)
These are the work of Syzmon Klimek from Poland. He has a website with pictures and videos of his astonishing work. The 'Internet Craftsmanship Museum' also has a page about him.
I have embedded one video of the brass engine below.
Originally found via the Make Blog.

What if the Earth had rings like Saturn?
That is the question posed - and answered - by 3D artist Roy Prol in this YouTube video which is also embedded below.
I originally came across this item via Buzzfeed here.