Peter Lindberg has recenly given his assessment of the object, opining that there is a 99% chance of it being natural, 0.9% of it being manmade, and 0.1% an extraterrestrial artifact. All very neat and precise for something we still know so little about. I'd put the manmade scenario at virtually zero, given what we believe we know about the natural history of the Baltic. I couldn't say about the rest of those odds.
*****The fact that the object looks superficially like stone does not establish that it is. I alluded before to the fact that artificial objects left in the sea for long periods of time often become thoroughly encrusted with mineral deposits. We can rule out corals. The waters of Scandinavia are too cold for these, but ordinary concretions of sand, shell particles, and the remains of sea plants are certainly possible. Anyone who wishes to see for themselves what a single century underwater can do to an artificial object, even in Northern waters, should look up the many images available of the Titanic. Given the passage of many centuries, or even millennia, an object might very well become less artificial looking, and more rock-like.
*****One consideration that supports the artificial nature of the object is this: The straight lines and right angles observed last year in the first sonar imagery, upon closer examination appear even straighter and more regular, reports Peter Lindberg. This is the opposite of cases where initial impressions of artificiality were destroyed by closer examination. Perhaps the most famous example of this is the so-called face on Mars.
Edited by bison, 23 June 2012 - 04:00 PM.