That was not Ziggy, it was the Spiders*. Although I believe that the Family Circus are from Pluto and Berke Breathed is from Encino, fwiw.
*I have no idea about Weird and Gilly.
0.000001% is still a chance.
Personally, I’m curious why the OP would talk about “The human circadian period”, and to one-minute precision. Different people have different circadian periods. While I personally think I would be a better fit to the Martian day, my sister is perhaps a bit short for Earth. Edison is said to have slept in two-hour segments between four-hour segments of activity, and I’ve heard tell second-hand of some folks who keep to a schedule of 18 hours of sleep followed by 36 of wakefulness. With that kind of variability, I think it’s a marvel of biology if the average is truly within an hour of the astronomical value.
And while we’re at it, Mars’ day is actually more like 24h39m35s, not such an “almost exact” fit to 24h53m.
Men are from Mars. Women are from Venus. I read that someplace on the web so it must be true.
Wow. That means, statistically, in the U.S. alone, there are 300 Martians. 
But still, they come…
Possibly in post #4 of this thread?
Maybe you’re from Mars. It seems like the simplest explanation.
Two things, one of which I don’t think has been explicitly addressed, and one of which is a nitpick:
- The 24-hour period of rotation is a temporary thing (a combination of when MAn started defining hours and Babylonian love of base 12), we’re moving from faster to slower via the Moon’s tidal effects, so really, we Humans are just ahead of our time in being pre-adapted for the coming 25HR day
- Mars is not “a desert under vacuum” - it’s a desert under an admittedly-thin mostly CO[sub]2[/sub] atmosphere.
Her legs fail to reach the ground?
As anyone who watches popular entertainment or reads Terry Pratchett knows, if something has million to one odds against it happening, it always happens. Therefore, we came from Mars ! The logic is flawless.
IIRC, when humans are put in an environment with no time cues (i.e., no windows, no clocks, no television, etc.) our sleep time increases until it is in the range of chimpanzees, more like 9 hours. I can no longer type the word “chimpanzee” without hearing I hate every ape I see/From chimpan-A to chimpan-Z. That is all.
Yeah, but million to one chances come out right, nine times out of ten
Si
I am a bit nervous about using a precise measurement of human activity cycles with the throwaway phrases ‘evolved on Mars’ and ‘came to Earth’.
What happened to the other life-forms on Mars?
How did primitive men travel millions of miles through space?
If two things share a numerical relationship, it doesn’t mean they are related.
If we compare say the frequency of eruptions in Yellowstone with the number of shark attacks in Australia and they ‘match’ it doesn’t mean that geysers are affecting sharks (nor that sharks are affecting geysers!).
so did Gary Sinise
If human circadian rhythms are indeed in sync with Mars’ rotational period, how does the OP explain that the human menstrual cycle is in sync with the orbital period of Earth’s moon? You can’t have it both ways, man.
Or would the OP go so far as to say that while men are from Mars, women are, in fact, from Earth?
(And yes, I know the lunar cycle thing is a coincidence. I’m being silly.)
Warning. Uninformed rambling follows.
As others have mentioned, they probably did in the past but then there used to be plenty of cues to tell us when to sleep, eat, hunt, etc.
These cues are now absent or ignorable, things like artificial light, better nutrition and a less active life might all enable longer waking periods. This in turns leads to longer periods of sleeping until it balances out into a longer cycle. I think it’s more human adaptability coming into play rather than any mysterious significance of the odd cycle-lengths.
SD
Ooh, that’d save tons of money on shoes…
For or against?