Ken Fabian's latest activity

Another possibility: a segment of the lightning path is approximately circular, and the observer is at the center of the circle. The...

I always thought that the speed of sound in air is about 340 m/s and used the rule "three seconds per kilometer" for a quick and dirty...

Ah, good catch. I got that very wrong - thinking 1200 metres per second when it is 1,200 (approx) km per hour. Post has been edited. Thanks.

A lightning bolt can be many kilometres long as well as reach high altitudes. There is sound transmitted through the ground as well as...

The largest part of the long tail of methane warming is going to be from the CO2 produced - persisting long after the methane itself has...

Surely average residence time is not the same as how long before it has all decayed to CH4 and H2O from contact with OH radicals - some...

@sophiecentaur - I suspect my government will differ from yours and future governments will differ from present ones. Decarbonising...

@sophiecentaur The principle commercial opportunity - once we look beyond communications and Earth observation satellites, that service...

That was you rreply to the question "who would pay"? The timescale doesn't ever seem to be included as a relevant factor and 'investors'...

Well, the Rift Valley (not the Nile) is where most of the fossil evidence of earliest humans (hominids) is found. That is not the same...

I think that level of integration may have it's place in larger systems - the larger multi story residential and commercial buildings...

Yes, these are representative/consequences of sea surface temperatures and differences in them, which are major drivers of weather...

I see big differences between migration to areas unoccupied by other humans - those earliest of migrations - and migrations later, into...

So... like a composite image but not?

@PeterDonis - Colour me surprised; I was thinking it might be a composite image - the thin crescent and some glow further out indicating...