The majority of humans are trichomats i.e. we have three different types of cells in our eyes, each sensitive to a different colour. I already knew about colour blind humans, i.e. dicrhomats. About 1/20 of males are colour blind.

Now I found out that some humans, apparently, are tetrachromats. Find out if you are one here (may not work on all computer monitors?)

Many animals are normally tetrachromats, for example birds. Then there are crazy examples like the mantis shrimps which seem to have cells sensitive to 16 different light wavelengths!

The second movie by a similar cast as the previous years’ five iron fist.

Best of the 10 (!) talks I watched on the train on the way back from London.

From Kemal Ataturk’s ingenious strategy to stop women from using a veil, to convincing people to eat potatoes, to rebranding of square cereal as diamond cereal.

How to change peoples’ perception of something, as in advertising, but for making a better world. Very entertaining and thought-provoking.

All of this is CGI. Hard to believe. Worth watching at full screen.

The Third & The Seventh from Alex Roman on Vimeo.

After this video, folding T-shirts will never be the same again.

I have watched it many times and can never do it out of memory, even though it seems so simple.

Here is a nice short video explaining many ways by which the United Kingdom and the crown are subdivided. It is quite complicated and more than the information required to pass the Life in the UK test.

Unfortunately it still does not explain why it is normal for people to ‘have nachos for tea today’.