The numbers gathered by the Nazis in WW2 agree with the numbers gathered after the war by people unsympathetic to the Nazis. How much more confirmation do you need before you cross the line from sceptic to denialist?

In the Western world, maybe. Denying the Holocaust is still a popular pastime in e.g. the Arabic world.

London Pneumatic Dispatch Company or London Post Office Railway

There's still an option to allow exact searches: Search tools->all results->Verbatim.

Drives me nuts too, I'll have to figure out how to specify that in the URL so I can at least call the page with that option already switched on.

You can see the RCS in action in this video

At first glance, it would seem that a circular orbit can still lead to varying tidal forces. The only requirement is that the planet is not tidally locked to the moon (i.e. the planet's rotation is not in sync with the moon's orbit). Or am I overlooking something?

The recoverable version (F9R) has a set of cold gas thrusters. Other than that, not much is known. See this page

In its current configuration, the stage can't hover: on its lowest thrust setting, the engine still provides too much thrust. So they land using a "hoverslam" maneuver where they try to decelerate to a vertical speed of 0 just as the stage intersects the barge.

There is an RCS at the top of the stage to keep the stage upright, but any lateral thrust at the bottom has to be done by gimbaling the main engine. The gimbaling angle is limited so they may have run out of control authority on this landing.

The astronauts are on a 24-hour work/sleep cycle. It may not have anything to do with sunrises and sunsets anymore (1), but is there any reason other than extreme pedantism to not call that cycle a day?

1: other than the sunrises and sunsets over the control centers in Houston and Moscow.

I'm sorry, a what now?

The Compact Cassette standard had one tape speed (4.76 cm/s). Readily available cassettes came with 60-minute or 90-minute runtimes (total). You could get C-120 cassettes with 1 hour per side, but those used extra-thin tape that jammed easily. The longest tapes ever made were C-180, for 90 minutes per side, these used even thinner tape and so unreliable they never sold widely.
I've never seen one, and I was a bit of an audiophile in those days.
You'd have to combine a C-180 tape with a non-standard playing speed (used only in dication machines) to get 3 hours per side.

But Esperanto hasn't succeeded, so we'd need a new language loosely based on it. Let's call it....
Esperanto++

Excel (first introduced on the Mac in 1985) was a huge step forward from Lotus 1-2-3. Word (first graphical version also on the Mac in 1985) blew WordPerfect right out of the water.
Developing these for the Mac gave Microsoft a taste of what a GUI could do, which was much more than Lotus and WordPerfect were doing with their crappy GUIs grafted onto CLI programs. Even by 1990 and Windows 3.0, Lotus and WordPerfect still stank.

That they bundled Word and Excel in 1989, whatever. The real innovation happened years before.

Interesting; things apparently regressed before they could progress. The first paper tape reader for a computer (Colossus) read at 5000 characters/s in normal operation, and could be cranked up to 9700 char/s (85 km/h), but the tape wasn't strong enough to survive that speed for long.
Of course, the Official Secrets Act made sure the Colossus design wasn't available on the open market.