On April 1, amateur metal detectorists Katarzyna Herdzik and Jacek Ukowski made a stunning discovery on a Polish beach. Their scanners led them to an ornate 24cm dagger covered in stars and crescent ...

If you think of a metal detector, you’re probably thinking of a fairly simple device with a big coil and a piercing whine coming from a tinny speaker. [mircemk] has built a more modern adaptation.