Yes, I just checked again (~ 21:25), they claim to place one stone every 20 s which is supposedly three times faster than the ancient egyptians did. However, they did not place one stone at a time, but several at different positions.

Estimated for 20 year construction time: 2.6 million stones/(20 y × 365 d/y × 12 h/d) = 30 stones/h

Some claim it possibly took only 10 to 15 years.

25 years ago (I hope this is sufficiently close to today) in Quarks & Co, a German TV science format, they analysed what it would take to build the Cheops pyramid in Cologne. It would take 10 month for the concrete foundation and 5 years for the lower two third of the pyramid. Use of modern technology makes it possible to place one stone every 20 seconds, which is triple the rate ancient egypt workers supposedly aceived. So I guess it would take 6-7 years in total.

Vielleicht eine Blaue Holzbiene.

I would also point out that my spell checker seems to think that the plural of roof is spelt “roofs” but I’m sure it ought to be “rooves” in the same way the plural of hoof as in part of a horse is hooves.

According to Wiktionary, both seem to be correct, but ‘roofs’ is the common variant.

Modern EVs such as Teslas have a high power consumption, much higher than some PV panels on the roof could deliver. Thus, it would only increase the weight of the car while not significantly increasing their range.

Gnuplot would usually be the first that comes into my mind. However, it’s command line only.

Labplot does not only have a GUI, it also integrates well into the KDE desktop environment.

Yes

You’re welcome.

All EM waves are photons.

When X or gamma ray photons interact with matter, e.g. by Compton scattering, i.e. hitting electrons of an atom. Thereby the photons loose discrete amounts of energy, leading to an increase of their wavelengths, and the electrons are then lifted on corresponding higher energy levels. When the electrons ‘fall’ back onto their base levels, additional photons are emitted.

Microwave photons, however, have to low energy for this kind of interaction. They e.g. induce vibrations and oscillations of molecules which is perceived as a temperature increase.

For the one I proposed, yellowish green is also possible. The one in your link seems to have a hairy abdomen, which I don’t see in your picture. Also it seems to be much darker greenly coloured. (Just my two cents, but I’m no expert)

Probably a crab spider Misumena vatia (NL: gewone kameleonspin D: veränderliche Krabbenspinne). They vary in colour quite a lot. Usually they are sitting on a blossom of similar colour and wait for prey.

Actually, German-Austrian, as his father is German and his mother is Austrian.

The same issue has happened to me a few times already. It seems to be a bug, no magic involved.

At the big bang only Hydrogen, some Helium and spurious amounts of Lithium have been formed. Heavier elements have been bred by stars in the meantime.

The temperature of space actually is close to absolute zero, so quite cold. As the heat balance of an object there is mainly dominated by radiation, the object looses heat (~T⁴) but almost has no heat input from the surrounding if not directed to a star in sufficient proximity, e.g. the sun. The surface exposed to sunlight however, can become really hot.

Isn’t the street that concrete area from where the picture was taken? So if a snow plough comes to remove the snow, it essentially would burry the hydrant.