Physicists may have cracked the case of “Zen” stones balanced on ice pedestals:
Visit the Small Sea of Lake Baikal in Russia during the winter and you'll likely see an unusual phenomenon: a flat rock balanced on a thin pedestal of ice, akin to stacking Zen stones common to Japanese gardens. The phenomenon is sometimes called a Baikal Zen formation. The typical explanation for how these formations occur is that the rock catches light (and heat) from the Sun and this melts the ice underneath until just a thin pedestal remains to support it. The water under the rock refreezes at night, and it's been suggested that wind may also be a factor.
Now, two French physicists believe they have solved the mystery of how these structures form, according to a new paper published in the Proceedings of the National Academy of Sciences—and their solution has nothing to do with the thermal conduction of the stone. Rather, they attribute the formation to a phenomenon known as sublimation, whereby snow or ice evaporates directly into vapor without passing through a water phase. Specifically, the shade provided by the stone hinders the sublimation rates of the surrounding ice in its vicinity, while the ice further away sublimates at a faster rate.
Many similar formations occur naturally in nature, such as hoodoos (tall, spindly structures that form over millions of years within sedimentary rock), mushroom rocks or rock pedestals (the base has been eroded by strong dusty winds), and glacier tables (a large stone sitting precariously on top of a narrow pedestal of ice). But the underlying mechanisms by which they form can be very different.
(Score: 2) by fishybell on Thursday September 30 2021, @02:24AM (2 children)
They didn't explain -- nor apparently does anyone else -- how the stones ended up on the ice.
Are there that many people just throwing stones onto frozen lakes that eventually we found a lake with the propensity to cause the "Zen" stones? Do that many stones just get tossed onto the lake from the beaches? They're always super smooth stones that look like they've spent decades in the water, so how'd they end up on top of the frozen lake in the winter?
(Score: 1, Offtopic) by Freeman on Thursday September 30 2021, @01:48PM (1 child)
In the event that you believe in the biblical Flood, it's not terribly hard to imagine how they got there. In the event that you believe at some point in history there was a great flood of some sort, then you also don't have to wonder how they got there.
https://en.wikipedia.org/wiki/Noah [wikipedia.org]
https://en.wikipedia.org/wiki/Outburst_flood [wikipedia.org]
Also, weird stuff, because people do stuff:
https://en.wikipedia.org/wiki/Stonehenge [wikipedia.org]
https://en.wikipedia.org/wiki/Moai [wikipedia.org]
I'd guess, probably not put there by humans, though.
Joshua 1:9 "Be strong and of a good courage; be not afraid, neither be thou dismayed: for the Lord thy God is with thee"
(Score: 2, Funny) by Anonymous Coward on Thursday September 30 2021, @06:55PM
...how the hell does that even remotely answer the question