Funny, yeah they look like normal concretions to my eye.

https://en.wikipedia.org/wiki/Concretion#Cannonball_concreti...

I grew up near cannonball river, things like this are all over. High iron content too because of water. I even have a version that looks like a cube but its just shale inside, paramagnetic too but thats due to water processes according to a geologist I talked to.

I'm not convinced it was made by people until you crack it open.

Mandy Edwards belongs to the School of Earth, Atmospheric and Environmental Sciences of the University of Manchester, and she claims..."The [iron] sphere could have actually been produced by a natural occurrence known as concretion, which is caused by the “precipitation of natural mineral cement within the spaces between sediment grains”."

It's in Bosnia. Alternatively, the article quotes Dr Sam Osmangich, a proponent of the theory that an "ancient civilisation that was once present here, dating back more than 1,500 years."

That's not a rock! That's a Terrie[1]!!

... or possibly a Fermie?

I'd not linger around for too long in any case. They might be feeling sporty.

[1] https://en.wikipedia.org/wiki/Land_Beneath_the_Ground!

If a nearly pure wad of space iron became molten on entering ancient earth's atmosphere and buried itself in relatively soft crust/clay, some sort of planetary "shot tower"[1] effect is out of the question? (and/or why no mention of "meteor"?)

[1] https://en.wikipedia.org/wiki/Shot_tower

They look similar to the Moeraki Boulders in New Zealand, also concretions which these might be too according to the article.

https://en.wikipedia.org/wiki/Moeraki_Boulders

Has nobody thought to ask the Bosnian guy _why_ this ancient (which it isn't either) civilization would create these balls? Every archaeologist I have ever met, and I've met a few, would tell you what it is based upon what it would be used for. Not the other way around. If he's just going to blindly speculate then it might just as well be a Minotaurus Humungus's testicle.

"The sphere could have actually been produced by a natural occurrence known as concretion"

'Concretion: The Enigmatic Stone Spheres of Franz Josef Land'

http://www.urbanghostsmedia.com/2015/07/stone-spheres-concre...

Some people hear hoofsteps and absolutely know it's a zebra

There is no division. Unless you include flat earthers dividing opinion on the earth is round.

It natural. Probably a concretion.

Aliens.

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