Once again, it's time for our collaboration with the always amusing What Is It? Blog! Do you know what the object in this picture is? You can win even if you don't know!
Place your guess in the comment section below. One guess per comment, please, though you can enter as many as you'd like. Post no URLs or weblinks, as doing so will forfeit your entry. Two winners: the first correct guess and the funniest (albeit ultimately wrong) guess will each win a T-shirt from the NeatoShop.
Please write your T-shirt selection alongside your guess. If you don't include a selection, you forfeit the prize, okay? May we suggest the Science T-Shirt, Funny T-Shirt and Artist-Designed T-Shirts?
Check out the What Is It? Blog for more mystery items of the week. Good luck!
Update: the mystery item is indeed a millstone. The first commenter who got it right (and followed all rules) was Craig Clayton, who wins a t-shirt from the NeatoShop! The funniest answer was from Dug, who said it is a "Recently unearthed Pompeii Satellite Dish Network receiver. It was still tuned to the Discovery channel when found. Some alarmist rhetoric show about end of the world, cataclysm, apocalypse, yadda yadda yadda." That one deserves a t-shirt, too! There were lots of funny answers this week; you should read them all. Several people mentioned the currency of Yap, which you can read more about in the post Funny Money: Strange currencies of the world. The answers to all this week's mystery items are posted at the What Is It? blog. Congratulations to the winners, and thanks to everyone for playing along!