Not so. There is currently about 260 000 km of railways in the US (of which about 150000 are 1st class), while there are 200 000 km in "Europe", which doesn't include places like the UK (over 15 000 km), so the two are very similar in terms of route length (adding in Canada and Mexico would make North America seem quite a bit bigger).

Edit: it occurs to me that the quoted figures are mostly route lengths, not track lengths. Since double tracking is much more prevalent in Europe than the US, I suspect the actual length of track is higher in Europe.

Of course you can. If I have two wavelengths of say 456 nm and 612 nm I absolutely can say their average [sic: mean] wavelength is 534 nm.

What is interesting is that because of the way human perception works, a human will denfinitely NOT see a 534 nm wavelength emission as being the same as the combination of two half-intensity 456 nm and 612 nm beams, since most humans are trichromatic, and our receptors have different, and most importantly, non-linear, responses.

Why does it have to say anything "important". The reddit is data is beautiful, not data is important! (Not that this particular example is beautiful, mind you).

Never heard of "the sick man of Europe", I take it?

Completely misleading, alas.

The vertical scale is megatons, and is 1-dimensional, but the graphics are 2-dimensional, and thus make the 50 Mt bomb look much bigger than it should be, not to mention the actual bombs' effects were spread over 3 dimensions, which is why in real life, the height of the Hiroshima bomb's cloud was ~15% that of the Tsar bomb, instead of the 0.03% this terrible chart shows.

Need to define consent here.

For example, this graphic seems to imply the age of consent in Japan is 13. While that is the age in certain specific situations, it is normally 18, which would make Japan blue, not red.

Likewise in New Zealand, the normal age of consent is 16, but a person under 16 may consent in some circumstances; contrarily, in some circumstances, the age is 18, not 16.

There is no single age of consent in these two countries (the two I am most familiar with), and I would wager this is the case for most countries.

Not a fan: the 24 hour and zero hour lines appear to missing, despite their annotations being present. (Alternatively, and more disconcertingly, they are present, but mislabelled).